Race condition in drivers/tty/n_hdlc.c in the Linux kernel through 4.10.1 allows local users to gain privileges or cause a denial of service (double free) by setting the HDLC line discipline.
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isdpkgvuln(pkg:\"linux-headers-3.16.0-4-all-amd64\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.16.0-4-all-arm64\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.16.0-4-all-armel\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.16.0-4-all-armhf\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.16.0-4-all-i386\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.16.0-4-all-mips\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.16.0-4-all-mipsel\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.16.0-4-all-powerpc\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.16.0-4-all-ppc64el\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.16.0-4-all-s390x\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.16.0-4-amd64\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.16.0-4-arm64\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.16.0-4-armmp\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.16.0-4-armmp-lpae\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.16.0-4-common\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.16.0-4-ixp4xx\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.16.0-4-kirkwood\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.16.0-4-loongson-2e\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.16.0-4-loongson-2f\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.16.0-4-loongson-3\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.16.0-4-octeon\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.16.0-4-orion5x\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.16.0-4-powerpc\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.16.0-4-powerpc-smp\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.16.0-4-powerpc64\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.16.0-4-powerpc64le\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.16.0-4-r4k-ip22\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.16.0-4-r5k-ip32\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.16.0-4-s390x\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.16.0-4-sb1-bcm91250a\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.16.0-4-versatile\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.2.0-4-4kc-malta\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.2.0-4-5kc-malta\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.2.0-4-all\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.2.0-4-all-mips\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.2.0-4-all-mipsel\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.2.0-4-common\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.2.0-4-loongson-2f\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.2.0-4-octeon\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.2.0-4-r4k-ip22\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.2.0-4-r5k-cobalt\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.2.0-4-r5k-ip32\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.2.0-4-sb1-bcm91250a\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-headers-3.2.0-4-sb1a-bcm91480b\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-4kc-malta\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-586\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-5kc-malta\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-686-pae\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-686-pae-dbg\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-amd64\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-amd64-dbg\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-arm64\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-arm64-dbg\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-armmp\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-armmp-lpae\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-ixp4xx\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-kirkwood\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-loongson-2e\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-loongson-2f\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-loongson-3\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-octeon\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-orion5x\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-powerpc\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-powerpc-smp\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-powerpc64\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-powerpc64le\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-r4k-ip22\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-r5k-ip32\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-s390x\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-s390x-dbg\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-sb1-bcm91250a\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-versatile\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-image-3.2.0-4-4kc-malta\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-image-3.2.0-4-5kc-malta\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-image-3.2.0-4-loongson-2f\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-image-3.2.0-4-octeon\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-image-3.2.0-4-r4k-ip22\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-image-3.2.0-4-r5k-cobalt\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-image-3.2.0-4-r5k-ip32\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-image-3.2.0-4-sb1-bcm91250a\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-image-3.2.0-4-sb1a-bcm91480b\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-libc-dev\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-manual-3.16\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-source-3.16\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"linux-support-3.16.0-4\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\nif ((res = isdpkgvuln(pkg:\"xen-linux-system-3.16.0-4-amd64\", ver:\"3.16.39-1+deb8u2\", rls_regex:\"DEB8.[0-9]+\")) != NULL) {\n report += res;\n}\n\nif (report != \"\") {\n security_message(data:report);\n} else if (__pkg_match) {\n exit(99); # Not vulnerable.\n}\n", "cvss": {"score": 7.2, "vector": "AV:LOCAL/AC:LOW/Au:NONE/C:COMPLETE/I:COMPLETE/A:COMPLETE/"}}, {"lastseen": "2020-01-29T20:12:22", "description": "Several vulnerabilities have been discovered in the Linux kernel that\nmay lead to a privilege escalation, denial of service or have other\nimpacts.\n\nCVE-2016-9588\n\nJim Mattson discovered that the KVM implementation for Intel x86\nprocessors does not properly handle #BP and #OF exceptions in an\nL2 (nested) virtual machine. A local attacker in an L2 guest VM\ncan take advantage of this flaw to cause a denial of service for\nthe L1 guest VM.\n\nCVE-2017-2636\n\nAlexander Popov discovered a race condition flaw in the n_hdlc\nline discipline that can lead to a double free. A local\nunprivileged user can take advantage of this flaw for privilege\nescalation. On systems that do not already have the n_hdlc module\nloaded, this can be mitigated by disabling it:\necho >> /etc/modprobe.d/disable-n_hdlc.conf install n_hdlc false\n\nCVE-2017-5669\n\nGareth Evans reported that privileged users can map memory at\naddress 0 through the shmat() system call. This could make it\neasier to exploit other kernel security vulnerabilities via a\nset-UID program.\n\nCVE-2017-5986\n\nAlexander Popov reported a race condition in the SCTP\nimplementation that can be used by local users to cause a\ndenial-of-service (crash). The initial fix for this was incorrect\nand introduced further security issues (CVE-2017-6353). This\nupdate includes a later fix that avoids those. On systems that do\nnot already have the sctp module loaded, this can be mitigated by\ndisabling it:\necho >> /etc/modprobe.d/disable-sctp.conf install sctp false\n\nCVE-2017-6214\n\nDmitry Vyukov reported a bug in the TCP implementation", "cvss3": {}, "published": "2018-01-12T00:00:00", "type": "openvas", "title": "Debian LTS: Security Advisory for linux (DLA-849-1)", "bulletinFamily": "scanner", "cvss2": {}, "cvelist": ["CVE-2017-2636", "CVE-2017-6348", "CVE-2017-6214", "CVE-2017-6345", "CVE-2017-5669", "CVE-2017-5986", "CVE-2017-6346", "CVE-2016-9588", "CVE-2017-6353"], "modified": "2020-01-29T00:00:00", "id": "OPENVAS:1361412562310890849", "href": "http://plugins.openvas.org/nasl.php?oid=1361412562310890849", "sourceData": "# Copyright (C) 2018 Greenbone Networks GmbH\n# Text descriptions are largely excerpted from the referenced\n# advisory, and are Copyright (C) of the respective author(s)\n#\n# SPDX-License-Identifier: GPL-2.0-or-later\n#\n# This program is free software; you can redistribute it and/or\n# modify it under the terms of the GNU General Public License\n# as published by the Free Software Foundation; either version 2\n# of the License, or (at your option) any later version.\n#\n# This program is distributed in the hope that it will be useful,\n# but WITHOUT ANY WARRANTY; without even the implied warranty of\n# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n# GNU General Public License for more details.\n#\n# You should have received a copy of the GNU General Public License\n# along with this program; if not, write to the Free Software\n# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.\n\nif(description)\n{\n script_oid(\"1.3.6.1.4.1.25623.1.0.890849\");\n script_version(\"2020-01-29T08:22:52+0000\");\n script_cve_id(\"CVE-2016-9588\", \"CVE-2017-2636\", \"CVE-2017-5669\", \"CVE-2017-5986\", \"CVE-2017-6214\", \"CVE-2017-6345\", \"CVE-2017-6346\", \"CVE-2017-6348\", \"CVE-2017-6353\");\n script_name(\"Debian LTS: Security Advisory for linux (DLA-849-1)\");\n script_tag(name:\"last_modification\", value:\"2020-01-29 08:22:52 +0000 (Wed, 29 Jan 2020)\");\n script_tag(name:\"creation_date\", value:\"2018-01-12 00:00:00 +0100 (Fri, 12 Jan 2018)\");\n script_tag(name:\"cvss_base\", value:\"7.2\");\n script_tag(name:\"cvss_base_vector\", value:\"AV:L/AC:L/Au:N/C:C/I:C/A:C\");\n script_tag(name:\"solution_type\", value:\"VendorFix\");\n script_tag(name:\"qod_type\", value:\"package\");\n\n script_xref(name:\"URL\", value:\"https://lists.debian.org/debian-lts-announce/2017/03/msg00007.html\");\n\n script_category(ACT_GATHER_INFO);\n\n script_copyright(\"Copyright (C) 2018 Greenbone Networks GmbH http://greenbone.net\");\n script_family(\"Debian Local Security Checks\");\n script_dependencies(\"gather-package-list.nasl\");\n script_mandatory_keys(\"ssh/login/debian_linux\", \"ssh/login/packages\", re:\"ssh/login/release=DEB7\");\n\n script_tag(name:\"affected\", value:\"linux on Debian Linux\");\n\n script_tag(name:\"solution\", value:\"For Debian 7 'Wheezy', these problems have been fixed in version\n3.2.86-1.\n\nFor Debian 8 'Jessie', these problems have been fixed in version\n3.16.39-1+deb8u2.\n\nWe recommend that you upgrade your linux packages.\");\n\n script_tag(name:\"summary\", value:\"Several vulnerabilities have been discovered in the Linux kernel that\nmay lead to a privilege escalation, denial of service or have other\nimpacts.\n\nCVE-2016-9588\n\nJim Mattson discovered that the KVM implementation for Intel x86\nprocessors does not properly handle #BP and #OF exceptions in an\nL2 (nested) virtual machine. 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isdpkgvuln(pkg:\"linux-image-3.2.0-4-rt-amd64-dbg\", ver:\"3.2.86-1\", rls:\"DEB7\"))) {\n report += res;\n}\nif(!isnull(res = isdpkgvuln(pkg:\"linux-image-3.2.0-4-versatile\", ver:\"3.2.86-1\", rls:\"DEB7\"))) {\n report += res;\n}\nif(!isnull(res = isdpkgvuln(pkg:\"linux-image-3.2.0-4-vexpress\", ver:\"3.2.86-1\", rls:\"DEB7\"))) {\n report += res;\n}\nif(!isnull(res = isdpkgvuln(pkg:\"linux-image-3.2.0-5-486\", ver:\"3.2.86-1\", rls:\"DEB7\"))) {\n report += res;\n}\nif(!isnull(res = isdpkgvuln(pkg:\"linux-image-3.2.0-5-686-pae\", ver:\"3.2.86-1\", rls:\"DEB7\"))) {\n report += res;\n}\nif(!isnull(res = isdpkgvuln(pkg:\"linux-image-3.2.0-5-686-pae-dbg\", ver:\"3.2.86-1\", rls:\"DEB7\"))) {\n report += res;\n}\nif(!isnull(res = isdpkgvuln(pkg:\"linux-image-3.2.0-5-amd64\", ver:\"3.2.86-1\", rls:\"DEB7\"))) {\n report += res;\n}\nif(!isnull(res = isdpkgvuln(pkg:\"linux-image-3.2.0-5-amd64-dbg\", ver:\"3.2.86-1\", rls:\"DEB7\"))) {\n report += res;\n}\nif(!isnull(res = 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isdpkgvuln(pkg:\"linux-image-3.2.0-5-rt-686-pae-dbg\", ver:\"3.2.86-1\", rls:\"DEB7\"))) {\n report += res;\n}\nif(!isnull(res = isdpkgvuln(pkg:\"linux-image-3.2.0-5-rt-amd64\", ver:\"3.2.86-1\", rls:\"DEB7\"))) {\n report += res;\n}\nif(!isnull(res = isdpkgvuln(pkg:\"linux-image-3.2.0-5-rt-amd64-dbg\", ver:\"3.2.86-1\", rls:\"DEB7\"))) {\n report += res;\n}\nif(!isnull(res = isdpkgvuln(pkg:\"linux-image-3.2.0-5-versatile\", ver:\"3.2.86-1\", rls:\"DEB7\"))) {\n report += res;\n}\nif(!isnull(res = isdpkgvuln(pkg:\"linux-image-3.2.0-5-vexpress\", ver:\"3.2.86-1\", rls:\"DEB7\"))) {\n report += res;\n}\nif(!isnull(res = isdpkgvuln(pkg:\"linux-libc-dev\", ver:\"3.2.86-1\", rls:\"DEB7\"))) {\n report += res;\n}\nif(!isnull(res = isdpkgvuln(pkg:\"linux-manual-3.2\", ver:\"3.2.86-1\", rls:\"DEB7\"))) {\n report += res;\n}\nif(!isnull(res = isdpkgvuln(pkg:\"linux-source-3.2\", ver:\"3.2.86-1\", rls:\"DEB7\"))) {\n report += res;\n}\nif(!isnull(res = isdpkgvuln(pkg:\"linux-support-3.2.0-4\", ver:\"3.2.86-1\", rls:\"DEB7\"))) {\n report += res;\n}\nif(!isnull(res = isdpkgvuln(pkg:\"linux-support-3.2.0-5\", ver:\"3.2.86-1\", rls:\"DEB7\"))) {\n report += res;\n}\nif(!isnull(res = isdpkgvuln(pkg:\"xen-linux-system-3.2.0-4-686-pae\", ver:\"3.2.86-1\", rls:\"DEB7\"))) {\n report += res;\n}\nif(!isnull(res = isdpkgvuln(pkg:\"xen-linux-system-3.2.0-4-amd64\", ver:\"3.2.86-1\", rls:\"DEB7\"))) {\n report += res;\n}\nif(!isnull(res = isdpkgvuln(pkg:\"xen-linux-system-3.2.0-5-686-pae\", ver:\"3.2.86-1\", rls:\"DEB7\"))) {\n report += res;\n}\nif(!isnull(res = isdpkgvuln(pkg:\"xen-linux-system-3.2.0-5-amd64\", ver:\"3.2.86-1\", rls:\"DEB7\"))) {\n report += res;\n}\n\nif(report != \"\") {\n security_message(data:report);\n} else if(__pkg_match) {\n exit(99);\n}\n", "cvss": {"score": 7.2, "vector": "AV:L/AC:L/Au:N/C:C/I:C/A:C"}}, {"lastseen": "2019-05-29T18:34:26", "description": "Several vulnerabilities have been discovered in the Linux kernel that\nmay lead to a privilege escalation, denial of service or have other\nimpacts.\n\nCVE-2016-9588\nJim Mattson discovered that the KVM implementation for Intel x86\nprocessors does not properly handle #BP and #OF exceptions in an\nL2 (nested) virtual machine. A local attacker in an L2 guest VM\ncan take advantage of this flaw to cause a denial of service for\nthe L1 guest VM.\n\nCVE-2017-2636Alexander Popov discovered a race condition flaw in the n_hdlc\nline discipline that can lead to a double free. A local\nunprivileged user can take advantage of this flaw for privilege\nescalation. On systems that do not already have the n_hdlc module\nloaded, this can be mitigated by disabling it:\necho>> /etc/modprobe.d/disable-n_hdlc.conf install n_hdlc falseCVE-2017-5669\nGareth Evans reported that privileged users can map memory at\naddress 0 through the shmat() system call. This could make it\neasier to exploit other kernel security vulnerabilities via a\nset-UID program.\n\nCVE-2017-5986Alexander Popov reported a race condition in the SCTP\nimplementation that can be used by local users to cause a\ndenial-of-service (crash). The initial fix for this was incorrect\nand introduced further security issues ( CVE-2017-6353). This update includes a later fix that\navoids those. On systems that do not already have the sctp\nmodule loaded, this can be mitigated by disabling it:\necho>> /etc/modprobe.d/disable-sctp.conf install sctp falseCVE-2017-6214\nDmitry Vyukov reported a bug in the TCP implementation", "cvss3": {}, "published": "2017-03-08T00:00:00", "type": "openvas", "title": "Debian Security Advisory DSA 3804-1 (linux - security update)", "bulletinFamily": "scanner", "cvss2": {}, "cvelist": ["CVE-2017-2636", "CVE-2017-6348", "CVE-2017-6214", "CVE-2017-6345", "CVE-2017-5669", "CVE-2017-5986", "CVE-2017-6346", "CVE-2016-9588", "CVE-2017-6353"], "modified": "2019-03-18T00:00:00", "id": "OPENVAS:1361412562310703804", "href": "http://plugins.openvas.org/nasl.php?oid=1361412562310703804", "sourceData": "# OpenVAS Vulnerability Test\n# $Id: deb_3804.nasl 14280 2019-03-18 14:50:45Z cfischer $\n# Auto-generated from advisory DSA 3804-1 using nvtgen 1.0\n# Script version: 1.0\n#\n# Author:\n# Greenbone Networks\n#\n# Copyright:\n# Copyright (c) 2017 Greenbone Networks GmbH http://greenbone.net\n# Text descriptions are largely excerpted from the referenced\n# advisory, and are Copyright (c) the respective author(s)\n#\n# This program is free software; you can redistribute it and/or\n# modify it under the terms of the GNU General Public License\n# as published by the Free Software Foundation; either version 2\n# of the License, or (at your option) any later version.\n#\n# This program is distributed in the hope that it will be useful,\n# but WITHOUT ANY WARRANTY; without even the implied warranty of\n# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n# GNU General Public License for more details.\n#\n# You should have received a copy of the GNU General Public License\n# along with this program; if not, write to the Free Software\n# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.\n#\n\nif(description)\n{\n script_oid(\"1.3.6.1.4.1.25623.1.0.703804\");\n script_version(\"$Revision: 14280 $\");\n script_cve_id(\"CVE-2016-9588\", \"CVE-2017-2636\", \"CVE-2017-5669\", \"CVE-2017-5986\", \"CVE-2017-6214\", \"CVE-2017-6345\", \"CVE-2017-6346\", \"CVE-2017-6348\", \"CVE-2017-6353\");\n script_name(\"Debian Security Advisory DSA 3804-1 (linux - security update)\");\n script_tag(name:\"last_modification\", value:\"$Date: 2019-03-18 15:50:45 +0100 (Mon, 18 Mar 2019) $\");\n script_tag(name:\"creation_date\", value:\"2017-03-08 00:00:00 +0100 (Wed, 08 Mar 2017)\");\n script_tag(name:\"cvss_base\", value:\"7.2\");\n script_tag(name:\"cvss_base_vector\", value:\"AV:L/AC:L/Au:N/C:C/I:C/A:C\");\n script_tag(name:\"solution_type\", value:\"VendorFix\");\n script_tag(name:\"qod_type\", value:\"package\");\n\n script_xref(name:\"URL\", value:\"http://www.debian.org/security/2017/dsa-3804.html\");\n\n script_category(ACT_GATHER_INFO);\n\n script_copyright(\"Copyright (c) 2017 Greenbone Networks GmbH http://greenbone.net\");\n script_family(\"Debian Local Security Checks\");\n script_dependencies(\"gather-package-list.nasl\");\n script_mandatory_keys(\"ssh/login/debian_linux\", \"ssh/login/packages\", re:\"ssh/login/release=DEB8\");\n script_tag(name:\"affected\", value:\"linux on Debian Linux\");\n script_tag(name:\"solution\", value:\"For the stable distribution (jessie), these problems have been fixed in\nversion 3.16.39-1+deb8u2.\n\nWe recommend that you upgrade your linux packages.\");\n script_tag(name:\"summary\", value:\"Several vulnerabilities have been discovered in the Linux kernel that\nmay lead to a privilege escalation, denial of service or have other\nimpacts.\n\nCVE-2016-9588\nJim Mattson discovered that the KVM implementation for Intel x86\nprocessors does not properly handle #BP and #OF exceptions in an\nL2 (nested) virtual machine. A local attacker in an L2 guest VM\ncan take advantage of this flaw to cause a denial of service for\nthe L1 guest VM.\n\nCVE-2017-2636Alexander Popov discovered a race condition flaw in the n_hdlc\nline discipline that can lead to a double free. A local\nunprivileged user can take advantage of this flaw for privilege\nescalation. On systems that do not already have the n_hdlc module\nloaded, this can be mitigated by disabling it:\necho>> /etc/modprobe.d/disable-n_hdlc.conf install n_hdlc falseCVE-2017-5669\nGareth Evans reported that privileged users can map memory at\naddress 0 through the shmat() system call. This could make it\neasier to exploit other kernel security vulnerabilities via a\nset-UID program.\n\nCVE-2017-5986Alexander Popov reported a race condition in the SCTP\nimplementation that can be used by local users to cause a\ndenial-of-service (crash). The initial fix for this was incorrect\nand introduced further security issues ( CVE-2017-6353). 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{\n report += res;\n}\nif((res = isdpkgvuln(pkg:\"linux-headers-3.16.0-4-powerpc-smp\", ver:\"3.16.39-1+deb8u2\", rls:\"DEB8\")) != NULL) {\n report += res;\n}\nif((res = isdpkgvuln(pkg:\"linux-headers-3.16.0-4-powerpc64\", ver:\"3.16.39-1+deb8u2\", rls:\"DEB8\")) != NULL) {\n report += res;\n}\nif((res = isdpkgvuln(pkg:\"linux-headers-3.16.0-4-powerpc64le\", ver:\"3.16.39-1+deb8u2\", rls:\"DEB8\")) != NULL) {\n report += res;\n}\nif((res = isdpkgvuln(pkg:\"linux-headers-3.16.0-4-r4k-ip22\", ver:\"3.16.39-1+deb8u2\", rls:\"DEB8\")) != NULL) {\n report += res;\n}\nif((res = isdpkgvuln(pkg:\"linux-headers-3.16.0-4-r5k-ip32\", ver:\"3.16.39-1+deb8u2\", rls:\"DEB8\")) != NULL) {\n report += res;\n}\nif((res = isdpkgvuln(pkg:\"linux-headers-3.16.0-4-s390x\", ver:\"3.16.39-1+deb8u2\", rls:\"DEB8\")) != NULL) {\n report += res;\n}\nif((res = isdpkgvuln(pkg:\"linux-headers-3.16.0-4-sb1-bcm91250a\", ver:\"3.16.39-1+deb8u2\", rls:\"DEB8\")) != NULL) {\n report += res;\n}\nif((res = 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{\n report += res;\n}\nif((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-586\", ver:\"3.16.39-1+deb8u2\", rls:\"DEB8\")) != NULL) {\n report += res;\n}\nif((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-5kc-malta\", ver:\"3.16.39-1+deb8u2\", rls:\"DEB8\")) != NULL) {\n report += res;\n}\nif((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-686-pae\", ver:\"3.16.39-1+deb8u2\", rls:\"DEB8\")) != NULL) {\n report += res;\n}\nif((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-686-pae-dbg\", ver:\"3.16.39-1+deb8u2\", rls:\"DEB8\")) != NULL) {\n report += res;\n}\nif((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-amd64\", ver:\"3.16.39-1+deb8u2\", rls:\"DEB8\")) != NULL) {\n report += res;\n}\nif((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-amd64-dbg\", ver:\"3.16.39-1+deb8u2\", rls:\"DEB8\")) != NULL) {\n report += res;\n}\nif((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-arm64\", ver:\"3.16.39-1+deb8u2\", rls:\"DEB8\")) != NULL) {\n report += res;\n}\nif((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-arm64-dbg\", ver:\"3.16.39-1+deb8u2\", rls:\"DEB8\")) != NULL) {\n report += res;\n}\nif((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-armmp\", ver:\"3.16.39-1+deb8u2\", rls:\"DEB8\")) != NULL) {\n report += res;\n}\nif((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-armmp-lpae\", ver:\"3.16.39-1+deb8u2\", rls:\"DEB8\")) != NULL) {\n report += res;\n}\nif((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-ixp4xx\", ver:\"3.16.39-1+deb8u2\", rls:\"DEB8\")) != NULL) {\n report += res;\n}\nif((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-kirkwood\", ver:\"3.16.39-1+deb8u2\", rls:\"DEB8\")) != NULL) {\n report += res;\n}\nif((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-loongson-2e\", ver:\"3.16.39-1+deb8u2\", rls:\"DEB8\")) != NULL) {\n report += res;\n}\nif((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-loongson-2f\", ver:\"3.16.39-1+deb8u2\", rls:\"DEB8\")) != NULL) {\n report += res;\n}\nif((res = isdpkgvuln(pkg:\"linux-image-3.16.0-4-loongson-3\", 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See the\n# GNU General Public License for more details.\n#\n# You should have received a copy of the GNU General Public License\n# along with this program; if not, write to the Free Software\n# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.\n\nif(description)\n{\n script_oid(\"1.3.6.1.4.1.25623.1.1.2.2019.1502\");\n script_version(\"2020-01-23T11:58:09+0000\");\n script_cve_id(\"CVE-2017-18255\", \"CVE-2017-18270\", \"CVE-2017-18344\", \"CVE-2017-2584\", \"CVE-2017-2596\", \"CVE-2017-2636\", \"CVE-2017-2647\", \"CVE-2017-2671\", \"CVE-2017-5551\", \"CVE-2017-5669\", \"CVE-2017-5970\", \"CVE-2017-5986\", \"CVE-2017-6001\", \"CVE-2017-6074\", \"CVE-2017-6214\", \"CVE-2017-6348\", \"CVE-2017-6353\", \"CVE-2017-6951\", \"CVE-2017-7187\", \"CVE-2017-7261\", \"CVE-2017-7294\", \"CVE-2017-7308\");\n script_tag(name:\"cvss_base\", value:\"7.6\");\n script_tag(name:\"cvss_base_vector\", value:\"AV:N/AC:H/Au:N/C:C/I:C/A:C\");\n script_tag(name:\"last_modification\", value:\"2020-01-23 11:58:09 +0000 (Thu, 23 Jan 2020)\");\n script_tag(name:\"creation_date\", value:\"2020-01-23 11:58:09 +0000 (Thu, 23 Jan 2020)\");\n script_name(\"Huawei EulerOS: Security Advisory for kernel (EulerOS-SA-2019-1502)\");\n script_category(ACT_GATHER_INFO);\n script_copyright(\"Copyright (C) 2020 Greenbone Networks GmbH\");\n script_family(\"Huawei EulerOS Local Security Checks\");\n script_dependencies(\"gb_huawei_euleros_consolidation.nasl\");\n script_mandatory_keys(\"ssh/login/euleros\", \"ssh/login/rpms\", re:\"ssh/login/release=EULEROSVIRT-3\\.0\\.1\\.0\");\n\n script_xref(name:\"EulerOS-SA\", value:\"2019-1502\");\n script_xref(name:\"URL\", value:\"https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2019-1502\");\n\n script_tag(name:\"summary\", value:\"The remote host is missing an update for the Huawei EulerOS\n 'kernel' package(s) announced via the EulerOS-SA-2019-1502 advisory.\");\n\n script_tag(name:\"vuldetect\", value:\"Checks if a vulnerable package version is present on the target host.\");\n\n script_tag(name:\"insight\", value:\"The perf_cpu_time_max_percent_handler function in kernel/events/core.c in the Linux kernel before 4.11 allows local users to cause a denial of service (integer overflow) or possibly have unspecified other impact via a large value, as demonstrated by an incorrect sample-rate calculation.(CVE-2017-18255)\n\nIn the Linux kernel before 4.13.5, a local user could create keyrings for other users via keyctl commands, setting unwanted defaults or causing a denial of service.(CVE-2017-18270)\n\nThe timer_create syscall implementation in kernel/time/posix-timers.c in the Linux kernel doesn't properly validate the sigevent-sigev_notify field, which leads to out-of-bounds access in the show_timer function.(CVE-2017-18344)\n\narch/x86/kvm/emulate.c in the Linux kernel through 4.9.3 allows local users to obtain sensitive information from kernel memory or cause a denial of service (use-after-free) via a crafted application that leverages instruction emulation for fxrstor, fxsave, sgdt, and sidt.(CVE-2017-2584)\n\nLinux kernel built with the KVM visualization support (CONFIG_KVM), with nested visualization(nVMX) feature enabled(nested=1), is vulnerable to host memory leakage issue. It could occur while emulating VMXON instruction in 'handle_vmon'. An L1 guest user could use this flaw to leak host memory potentially resulting in DoS.(CVE-2017-2596)\n\nA race condition flaw was found in the N_HLDC Linux kernel driver when accessing n_hdlc.tbuf list that can lead to double free. A local, unprivileged user able to set the HDLC line discipline on the tty device could use this flaw to increase their privileges on the system.(CVE-2017-2636)\n\nA flaw was found that can be triggered in keyring_search_iterator in keyring.c if type-match is NULL. A local user could use this flaw to crash the system or, potentially, escalate their privileges.(CVE-2017-2647)\n\nA race condition leading to a NULL pointer dereference was found in the Linux kernel's Link Layer Control implementation. A local attacker with access to ping sockets could use this flaw to crash the system.(CVE-2017-2671)\n\nA vulnerability was found in the Linux kernel in 'tmpfs' file system. 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A local, unprivileged user able to set the HDLC line discipline on the tty device could use this flaw to increase their privileges on the system.\n#### Mitigation\n\nThe n_hdlc kernel module will be automatically loaded when an application attempts to use the HDLC line discipline from userspace. This module can be prevented from being loaded by using the system-wide modprobe rules. The following command, run as root, will prevent accidental or intentional loading of the module. Red Hat Product Security believe this method is a robust method to prevent accidental loading of the module, even by privileged users. \n\n\n\u200b# echo "install n_hdlc /bin/true" >> /etc/modprobe.d/disable-n_hdlc.conf \n\n\nThe system will need to be restarted if the n_hdlc modules are already loaded. In most circumstances, the n_hdlc kernel modules will be unable to be unloaded if in use and while any current process using this line discipline is required. \n\n\nExploiting this flaw does not require Microgate or SyncLink hardware to be in use. \n\n\nIf further assistance is needed, see this KCS article ( <https://access.redhat.com/solutions/41278> ) or contact Red Hat Global Support Services. \n\n", "cvss3": {"exploitabilityScore": 1.8, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "baseScore": 7.8, "privilegesRequired": "LOW", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "userInteraction": "NONE", "version": "3.0"}, "impactScore": 5.9}, "published": "2019-11-03T16:23:08", "type": "redhatcve", "title": "CVE-2017-2636", "bulletinFamily": "info", "cvss2": {"severity": "HIGH", "exploitabilityScore": 3.9, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "baseScore": 7.2, "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C", "version": "2.0", "accessVector": "LOCAL", "authentication": "NONE"}, "impactScore": 10.0, "obtainUserPrivilege": false}, "cvelist": ["CVE-2017-2636"], "modified": "2021-05-28T01:19:10", "id": "RH:CVE-2017-2636", "href": "https://access.redhat.com/security/cve/CVE-2017-2636", "cvss": {"score": 7.2, "vector": "AV:L/AC:L/Au:N/C:C/I:C/A:C"}}], "veracode": [{"lastseen": "2023-04-18T13:27:19", "description": "kernel is vulnerable to denial of service (DoS) attacks. The vulnerability exists as a race condition in drivers/tty/n_hdlc.c in the Linux kernel through 4.10.1 allows local users to gain privileges or cause a denial of service (double free) by setting the HDLC line discipline.\n", "cvss3": {"exploitabilityScore": 1.0, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "HIGH", "scope": "UNCHANGED", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "baseScore": 7.0, "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2019-01-15T09:17:04", "type": "veracode", "title": "Denial Of Service (DoS)", "bulletinFamily": "software", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 3.4, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "baseScore": 6.9, "vectorString": "AV:L/AC:M/Au:N/C:C/I:C/A:C", "version": "2.0", "accessVector": "LOCAL", "authentication": "NONE"}, "impactScore": 10.0, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2017-2636"], "modified": "2023-02-24T19:57:12", "id": "VERACODE:12432", "href": "https://sca.analysiscenter.veracode.com/vulnerability-database/security/1/1/sid-12432/summary", "cvss": {"score": 6.9, "vector": "AV:L/AC:M/Au:N/C:C/I:C/A:C"}}], "redhat": [{"lastseen": "2023-08-04T12:29:22", "description": "The kernel packages contain the Linux kernel, the core of any Linux operating system.\n\nSecurity Fix(es):\n\n* A race condition flaw was found in the N_HLDC Linux kernel driver when accessing n_hdlc.tbuf list that can lead to double free. A local, unprivileged user able to set the HDLC line discipline on the tty device could use this flaw to increase their privileges on the system. (CVE-2017-2636, Important)\n\nRed Hat would like to thank Alexander Popov for reporting this issue.", "cvss3": {"exploitabilityScore": 1.0, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "HIGH", "scope": "UNCHANGED", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "baseScore": 7.0, "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2017-04-25T09:21:16", "type": "redhat", "title": "(RHSA-2017:1126) Important: kernel security update", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 3.4, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "baseScore": 6.9, "vectorString": "AV:L/AC:M/Au:N/C:C/I:C/A:C", "version": "2.0", "accessVector": "LOCAL", "authentication": "NONE"}, "impactScore": 10.0, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2017-2636"], "modified": "2017-04-25T09:23:48", "id": "RHSA-2017:1126", "href": "https://access.redhat.com/errata/RHSA-2017:1126", "cvss": {"score": 6.9, "vector": "AV:L/AC:M/Au:N/C:C/I:C/A:C"}}, {"lastseen": "2023-08-04T12:29:22", "description": "The kernel packages contain the Linux kernel, the core of any Linux operating system.\n\nSecurity Fix(es):\n\n* A race condition flaw was found in the N_HLDC Linux kernel driver when accessing n_hdlc.tbuf list that can lead to double free. A local, unprivileged user able to set the HDLC line discipline on the tty device could use this flaw to increase their privileges on the system. (CVE-2017-2636, Important)\n\nRed Hat would like to thank Alexander Popov for reporting this issue.", "cvss3": {"exploitabilityScore": 1.0, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "HIGH", "scope": "UNCHANGED", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "baseScore": 7.0, "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2017-05-16T09:06:20", "type": "redhat", "title": "(RHSA-2017:1233) Important: kernel security update", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 3.4, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "baseScore": 6.9, "vectorString": "AV:L/AC:M/Au:N/C:C/I:C/A:C", "version": "2.0", "accessVector": "LOCAL", "authentication": "NONE"}, "impactScore": 10.0, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2017-2636"], "modified": "2017-05-16T09:14:09", "id": "RHSA-2017:1233", "href": "https://access.redhat.com/errata/RHSA-2017:1233", "cvss": {"score": 6.9, "vector": "AV:L/AC:M/Au:N/C:C/I:C/A:C"}}, {"lastseen": "2023-08-04T12:29:22", "description": "The kernel packages contain the Linux kernel, the core of any Linux operating system.\n\nSecurity Fix(es):\n\n* A race condition flaw was found in the N_HLDC Linux kernel driver when accessing n_hdlc.tbuf list that can lead to double free. A local, unprivileged user able to set the HDLC line discipline on the tty device could use this flaw to increase their privileges on the system. (CVE-2017-2636, Important)\n\nRed Hat would like to thank Alexander Popov for reporting this issue.", "cvss3": {"exploitabilityScore": 1.0, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "HIGH", "scope": "UNCHANGED", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "baseScore": 7.0, "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2017-04-18T09:16:05", "type": "redhat", "title": "(RHSA-2017:0986) Important: kernel security update", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 3.4, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "baseScore": 6.9, "vectorString": "AV:L/AC:M/Au:N/C:C/I:C/A:C", "version": "2.0", "accessVector": "LOCAL", "authentication": "NONE"}, "impactScore": 10.0, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2017-2636"], "modified": "2017-04-18T09:18:08", "id": "RHSA-2017:0986", "href": "https://access.redhat.com/errata/RHSA-2017:0986", "cvss": {"score": 6.9, "vector": "AV:L/AC:M/Au:N/C:C/I:C/A:C"}}, {"lastseen": "2023-08-04T12:29:22", "description": "The kernel packages contain the Linux kernel, the core of any Linux operating system.\n\nSecurity Fix(es):\n\n* A race condition flaw was found in the N_HLDC Linux kernel driver when accessing n_hdlc.tbuf list that can lead to double free. A local, unprivileged user able to set the HDLC line discipline on the tty device could use this flaw to increase their privileges on the system. (CVE-2017-2636, Important)\n\nRed Hat would like to thank Alexander Popov for reporting this issue.\n\nBug Fix(es):\n\n* Previously, memory allocation in the libceph kernel module did not work correctly. Consequently, the file system on a RADOS Block Device(RBD) could become unresponsive in the situations under high memory pressure. With this update, the underlying source code has been fixed, and the file system no longer hangs in the described scenario. (BZ#1418314)\n\n* Previously, the mpt3sas driver incorrectly checked the Transport Layer Retries (TLR) state even on Redundant Array Of Independent Discs (RAID) devices. Consequently, a kernel panic occurred when mpt3sas attempted to read from the RAID devices. With this update, mpt3sas has been fixed to check the TLR state only for non-RAID devices, and the kernel no longer panics under the described circumstances. (BZ#1427453)", "cvss3": {"exploitabilityScore": 1.0, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "HIGH", "scope": "UNCHANGED", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "baseScore": 7.0, "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2017-04-25T09:20:19", "type": "redhat", "title": "(RHSA-2017:1125) Important: kernel security and bug fix update", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 3.4, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "baseScore": 6.9, "vectorString": "AV:L/AC:M/Au:N/C:C/I:C/A:C", "version": "2.0", "accessVector": "LOCAL", "authentication": "NONE"}, "impactScore": 10.0, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2017-2636"], "modified": "2017-08-28T02:44:17", "id": "RHSA-2017:1125", "href": "https://access.redhat.com/errata/RHSA-2017:1125", "cvss": {"score": 6.9, "vector": "AV:L/AC:M/Au:N/C:C/I:C/A:C"}}, {"lastseen": "2023-08-04T12:29:22", "description": "The kernel packages contain the Linux kernel, the core of any Linux operating system.\n\nSecurity Fix(es):\n\n* A race condition flaw was found in the N_HLDC Linux kernel driver when accessing n_hdlc.tbuf list that can lead to double free. A local, unprivileged user able to set the HDLC line discipline on the tty device could use this flaw to increase their privileges on the system. (CVE-2017-2636, Important)\n\nRed Hat would like to thank Alexander Popov for reporting this issue.", "cvss3": {"exploitabilityScore": 1.0, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "HIGH", "scope": "UNCHANGED", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "baseScore": 7.0, "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2017-05-16T09:05:54", "type": "redhat", "title": "(RHSA-2017:1232) Important: kernel security update", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 3.4, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "baseScore": 6.9, "vectorString": "AV:L/AC:M/Au:N/C:C/I:C/A:C", "version": "2.0", "accessVector": "LOCAL", "authentication": "NONE"}, "impactScore": 10.0, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2017-2636"], "modified": "2017-05-16T09:11:12", "id": "RHSA-2017:1232", "href": "https://access.redhat.com/errata/RHSA-2017:1232", "cvss": {"score": 6.9, "vector": "AV:L/AC:M/Au:N/C:C/I:C/A:C"}}, {"lastseen": "2023-08-04T12:29:22", "description": "The kernel packages contain the Linux kernel, the core of any Linux operating system.\n\nSecurity Fix(es):\n\n* A race condition flaw was found in the N_HLDC Linux kernel driver when accessing n_hdlc.tbuf list that can lead to double free. A local, unprivileged user able to set the HDLC line discipline on the tty device could use this flaw to increase their privileges on the system. (CVE-2017-2636, Important)\n\n* A flaw was found in the Linux kernel's implementation of seq_file where a local attacker could manipulate memory in the put() function pointer. This could lead to memory corruption and possible privileged escalation. (CVE-2016-7910, Moderate)\n\nRed Hat would like to thank Alexander Popov for reporting CVE-2017-2636.\n\nBug Fix(es):\n\n* Previously, Chelsio firmware included an incorrectly-formatted firmware bin file. As a consequence, the firmware could not be flashed. This update provides a firmware bin file that is formatted correctly. As a result, Chelsio firmware can now be flashed successfully. (BZ#1433865)\n\n* When multiple simultaneous processes attempted to read from the /proc/stat file, spinlock overhead was generated on Non-Uniform Memory Access (NUMA) systems. Consequently, a large amount of CPU was consumed. With this update, the underlying source code has been fixed to avoid taking spinlock when the interrupt line does not exist. As a result, the spinlock overhead is now generated less often, and multiple simultaneous processes can now read /proc/stat without consuming a large amount of CPU. (BZ#1428106)", "cvss3": {"exploitabilityScore": 1.8, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 7.8, "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "REQUIRED"}, "impactScore": 5.9}, "published": "2017-04-11T10:30:37", "type": "redhat", "title": "(RHSA-2017:0892) Important: kernel security and bug fix update", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "baseScore": 9.3, "vectorString": "AV:N/AC:M/Au:N/C:C/I:C/A:C", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 10.0, "obtainUserPrivilege": false}, "cvelist": ["CVE-2016-7910", "CVE-2017-2636"], "modified": "2018-06-07T14:22:01", "id": "RHSA-2017:0892", "href": "https://access.redhat.com/errata/RHSA-2017:0892", "cvss": {"score": 9.3, "vector": "AV:N/AC:M/Au:N/C:C/I:C/A:C"}}, {"lastseen": "2023-09-12T04:37:38", "description": "The kernel packages contain the Linux kernel, the core of any Linux operating system.\n\nSecurity Fix(es):\n\n* A flaw was found in the way memory was being allocated on the stack for user space binaries. If heap (or different memory region) and stack memory regions were adjacent to each other, an attacker could use this flaw to jump over the stack guard gap, cause controlled memory corruption on process stack or the adjacent memory region, and thus increase their privileges on the system. This is a kernel-side mitigation which increases the stack guard gap size from one page to 1 MiB to make successful exploitation of this issue more difficult. (CVE-2017-1000364, Important)\n\n* A race condition flaw was found in the N_HLDC Linux kernel driver when accessing n_hdlc.tbuf list that can lead to double free. A local, unprivileged user able to set the HDLC line discipline on the tty device could use this flaw to increase their privileges on the system. (CVE-2017-2636, Important)\n\nRed Hat would like to thank Qualys Research Labs for reporting CVE-2017-1000364 and Alexander Popov for reporting CVE-2017-2636.\n\nBug Fix(es):\n\n* Previously, the kdump mechanism was trying to get the lock by the vmalloc_sync_all() function during a kernel panic. Consequently, a deadlock occurred, and the crashkernel did not boot. This update fixes the vmalloc_sync_all() function to avoid synchronizing the vmalloc area on the crashing CPU. As a result, the crashkernel parameter now boots as expected, and the kernel dump is collected successfully under the described circumstances. (BZ#1443497)\n\n* Previously, a kernel panic occurred when the mcelog daemon executed a huge page memory offline. This update fixes the HugeTLB feature of the Linux kernel to check for the Page Table Entry (PTE) NULL pointer in the page_check_address() function. As a result, the kernel panic no longer occurs under the described circumstances. (BZ#1444349)\n\n* Previously, the vmw_pvscsi driver reported most successful aborts as FAILED due to a bug in vmw_pvscsi abort handler. This update fixes the handler, and successful aborts are no longer reported as FAILED. (BZ#1442966)", "cvss3": {"exploitabilityScore": 1.8, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "baseScore": 7.8, "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2017-06-19T15:03:12", "type": "redhat", "title": "(RHSA-2017:1488) Important: kernel security and bug fix update", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 3.9, "obtainAllPrivilege": true, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "baseScore": 7.2, "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C", "version": "2.0", "accessVector": "LOCAL", "authentication": "NONE"}, "impactScore": 10.0, "obtainUserPrivilege": false}, "cvelist": ["CVE-2017-1000364", "CVE-2017-1000379", "CVE-2017-2636"], "modified": "2017-08-29T05:30:57", "id": "RHSA-2017:1488", "href": "https://access.redhat.com/errata/RHSA-2017:1488", "cvss": {"score": 7.2, "vector": "AV:L/AC:L/Au:N/C:C/I:C/A:C"}}, {"lastseen": "2023-08-04T12:29:22", "description": "The kernel packages contain the Linux kernel, the core of any Linux operating system.\n\nThese updated kernel packages include several security issues and numerous bug fixes. Space precludes documenting all of these bug fixes in this advisory. To see the complete list of bug fixes, users are directed to the related Knowledge Article: https://access.redhat.com/articles/2986951.\n\nSecurity Fix(es):\n\n* A race condition flaw was found in the N_HLDC Linux kernel driver when accessing n_hdlc.tbuf list that can lead to double free. A local, unprivileged user able to set the HDLC line discipline on the tty device could use this flaw to increase their privileges on the system. (CVE-2017-2636, Important)\n\n* A flaw was found in the Linux kernel key management subsystem in which a local attacker could crash the kernel or corrupt the stack and additional memory (denial of service) by supplying a specially crafted RSA key. This flaw panics the machine during the verification of the RSA key. (CVE-2016-8650, Moderate)\n\n* A flaw was found in the Linux kernel's implementation of setsockopt for the SO_{SND|RCV}BUFFORCE setsockopt() system call. Users with non-namespace CAP_NET_ADMIN are able to trigger this call and create a situation in which the sockets sendbuff data size could be negative. This could adversely affect memory allocations and create situations where the system could crash or cause memory corruption. (CVE-2016-9793, Moderate)\n\n* A flaw was found in the Linux kernel's handling of clearing SELinux attributes on /proc/pid/attr files. An empty (null) write to this file can crash the system by causing the system to attempt to access unmapped kernel memory. (CVE-2017-2618, Moderate)\n\nRed Hat would like to thank Alexander Popov for reporting CVE-2017-2636 and Ralf Spenneberg for reporting CVE-2016-8650. The CVE-2017-2618 issue was discovered by Paul Moore (Red Hat Engineering).", "cvss3": {"exploitabilityScore": 1.8, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "baseScore": 7.8, "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2017-04-12T10:39:45", "type": "redhat", "title": "(RHSA-2017:0933) Important: kernel security, bug fix, and enhancement update", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 3.9, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "baseScore": 7.2, "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C", "version": "2.0", "accessVector": "LOCAL", "authentication": "NONE"}, "impactScore": 10.0, "obtainUserPrivilege": false}, "cvelist": ["CVE-2016-8650", "CVE-2016-9793", "CVE-2017-2618", "CVE-2017-2636"], "modified": "2018-04-11T23:33:36", "id": "RHSA-2017:0933", "href": "https://access.redhat.com/errata/RHSA-2017:0933", "cvss": {"score": 7.2, "vector": "AV:L/AC:L/Au:N/C:C/I:C/A:C"}}, {"lastseen": "2023-08-04T12:29:22", "description": "The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.\n\nSecurity Fix(es):\n\n* A race condition flaw was found in the N_HLDC Linux kernel driver when accessing n_hdlc.tbuf list that can lead to double free. A local, unprivileged user able to set the HDLC line discipline on the tty device could use this flaw to increase their privileges on the system. (CVE-2017-2636, Important)\n\n* A flaw was found in the Linux kernel key management subsystem in which a local attacker could crash the kernel or corrupt the stack and additional memory (denial of service) by supplying a specially crafted RSA key. This flaw panics the machine during the verification of the RSA key. (CVE-2016-8650, Moderate)\n\n* A flaw was found in the Linux kernel's implementation of setsockopt for the SO_{SND|RCV}BUFFORCE setsockopt() system call. Users with non-namespace CAP_NET_ADMIN are able to trigger this call and create a situation in which the sockets sendbuff data size could be negative. This could adversely affect memory allocations and create situations where the system could crash or cause memory corruption. (CVE-2016-9793, Moderate)\n\n* A flaw was found in the Linux kernel's handling of clearing SELinux attributes on /proc/pid/attr files. An empty (null) write to this file can crash the system by causing the system to attempt to access unmapped kernel memory. (CVE-2017-2618, Moderate)\n\nRed Hat would like to thank Alexander Popov for reporting CVE-2017-2636 and Ralf Spenneberg for reporting CVE-2016-8650. The CVE-2017-2618 issue was discovered by Paul Moore (Red Hat Engineering).\n\nBug Fix(es):\n\n* Previously, a cgroups data structure was sometimes corrupted due to a race condition in the kernel-rt cgroups code. Consequently, several system tasks were blocked, and the operating system became unresponsive. This update adds a lock that prevents the race condition. As a result, the cgroups data structure no longer gets corrupted and the operating system no longer hangs under the described circumstances. (BZ#1420784)\n\n* The kernel-rt packages have been upgraded to the 3.10.0-514.16.1 source tree, which provides a number of bug fixes over the previous version. (BZ#1430749)", "cvss3": {"exploitabilityScore": 1.8, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "baseScore": 7.8, "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2017-04-12T10:29:33", "type": "redhat", "title": "(RHSA-2017:0931) Important: kernel-rt security and bug fix update", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 3.9, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "baseScore": 7.2, "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C", "version": "2.0", "accessVector": "LOCAL", "authentication": "NONE"}, "impactScore": 10.0, "obtainUserPrivilege": false}, "cvelist": ["CVE-2016-8650", "CVE-2016-9793", "CVE-2017-2618", "CVE-2017-2636"], "modified": "2018-03-19T12:29:53", "id": "RHSA-2017:0931", "href": "https://access.redhat.com/errata/RHSA-2017:0931", "cvss": {"score": 7.2, "vector": "AV:L/AC:L/Au:N/C:C/I:C/A:C"}}, {"lastseen": "2023-08-04T12:29:22", "description": "The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.\n\nSecurity Fix(es):\n\n* A race condition flaw was found in the N_HLDC Linux kernel driver when accessing n_hdlc.tbuf list that can lead to double free. A local, unprivileged user able to set the HDLC line discipline on the tty device could use this flaw to increase their privileges on the system. (CVE-2017-2636, Important)\n\n* A use-after-free flaw was found in the way the Linux kernel's Datagram Congestion Control Protocol (DCCP) implementation freed SKB (socket buffer) resources for a DCCP_PKT_REQUEST packet when the IPV6_RECVPKTINFO option is set on the socket. A local, unprivileged user could use this flaw to alter the kernel memory, allowing them to escalate their privileges on the system. (CVE-2017-6074, Important)\n\n* A flaw was found in the Linux kernel key management subsystem in which a local attacker could crash the kernel or corrupt the stack and additional memory (denial of service) by supplying a specially crafted RSA key. This flaw panics the machine during the verification of the RSA key. (CVE-2016-8650, Moderate)\n\n* A flaw was found in the Linux kernel's implementation of setsockopt for the SO_{SND|RCV}BUFFORCE setsockopt() system call. Users with non-namespace CAP_NET_ADMIN are able to trigger this call and create a situation in which the sockets sendbuff data size could be negative. This could adversely affect memory allocations and create situations where the system could crash or cause memory corruption. (CVE-2016-9793, Moderate)\n\n* A flaw was found in the Linux kernel's handling of clearing SELinux attributes on /proc/pid/attr files. An empty (null) write to this file can crash the system by causing the system to attempt to access unmapped kernel memory. (CVE-2017-2618, Moderate)\n\nRed Hat would like to thank Alexander Popov for reporting CVE-2017-2636; Andrey Konovalov (Google) for reporting CVE-2017-6074; and Ralf Spenneberg for reporting CVE-2016-8650. The CVE-2017-2618 issue was discovered by Paul Moore (Red Hat Engineering).\n\nBug Fix(es):\n\n* The kernel-rt packages have been upgraded to version 3.10.0-514.rt56.219, which provides a number of bug fix updates over the previous version. (BZ#1429613)", "cvss3": {"exploitabilityScore": 1.8, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "baseScore": 7.8, "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2017-04-12T10:32:45", "type": "redhat", "title": "(RHSA-2017:0932) Important: kernel-rt security and bug fix update", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 3.9, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "baseScore": 7.2, "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C", "version": "2.0", "accessVector": "LOCAL", "authentication": "NONE"}, "impactScore": 10.0, "obtainUserPrivilege": false}, "cvelist": ["CVE-2016-8650", "CVE-2016-9793", "CVE-2017-2618", "CVE-2017-2636", "CVE-2017-6074"], "modified": "2018-06-07T14:14:51", "id": "RHSA-2017:0932", "href": "https://access.redhat.com/errata/RHSA-2017:0932", "cvss": {"score": 7.2, "vector": "AV:L/AC:L/Au:N/C:C/I:C/A:C"}}], "nessus": [{"lastseen": "2023-05-18T14:10:24", "description": "Alexander Popov discovered that the N_HDLC line discipline implementation in the Linux kernel contained a double-free vulnerability. 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