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The CVE entry summarizes this as:\n\t\nThe tcp_request function in Dnsmasq before 2.73rc4\n\t does not properly handle the return value of the setup_reply function,\n\t which allows remote attackers to read process memory and cause a\n\t denial of service (out-of-bounds read and crash) via a malformed DNS\n\t request.\"\n\n", "edition": 3, "reporter": "FreeBSD", "published": "2015-04-07T00:00:00", "title": "dnsmasq -- data exposure and denial of service", "type": "freebsd", "enchantments": {"score": {"vector": "NONE", "value": 5.0}}, "bulletinFamily": "unix", "cvelist": ["CVE-2015-3294"], "modified": "2015-04-07T00:00:00", "id": "37569EB7-0125-11E5-9D98-080027EF73EC", "href": "https://vuxml.freebsd.org/freebsd/37569eb7-0125-11e5-9d98-080027ef73ec.html", "cvss": {"score": 6.4, "vector": "AV:NETWORK/AC:LOW/Au:NONE/C:PARTIAL/I:NONE/A:PARTIAL/"}}], "securityvulns": [{"lastseen": "2018-08-31T11:10:00", "references": ["https://vulners.com/securityvulns/securityvulns:doc:31957", "https://vulners.com/securityvulns/securityvulns:doc:32005"], "description": "Uninitilized memory dereference on DNS request parsing.", "edition": 1, "reporter": "BUGTRAQ", "published": "2015-05-05T00:00:00", "title": "dnsmasq uninitialized memory dereference", "type": "securityvulns", "enchantments": {"score": {"modified": "2018-08-31T11:10:00", "vector": "NONE", "value": 7.2}}, "bulletinFamily": "software", "affectedSoftware": [{"name": "dnsmasq", "version": "2.73", "operator": "eq"}], "cvelist": ["CVE-2015-3294"], "modified": "2015-05-05T00:00:00", "id": "SECURITYVULNS:VULN:14423", "href": "https://vulners.com/securityvulns/SECURITYVULNS:VULN:14423", "cvss": {"score": 6.4, "vector": "AV:NETWORK/AC:LOW/Au:NONE/C:PARTIAL/I:NONE/A:PARTIAL/"}}, {"lastseen": "2018-08-31T11:10:58", "references": [], "description": "\r\n\r\n&quot;Dnsmasq 2.72 Unchecked returned value&quot;\r\n\r\nDescription\r\n------------------------------------------------------------\r\nDnsmasq does not properly check the return value of the setup_reply&#40;&#41;\r\nfunction called during a tcp connection &#40;by the tcp_request&#40;&#41; function&#41;.\r\nThis return value is then used as a size argument in a function which writes\r\ndata on the client&#39;s connection. This may lead, upon successful\r\nexploitation, to reading the heap memory of dnsmasq.\r\n \r\nIn more detail:\r\nFunction tcp_request&#40;&#41; calls setup_reply&#40;&#41; and the returned value is used as\r\na size argument in a write function.\r\n \r\nm = setup_reply&#40;header, &#40;unsigned int&#41;size, addrp, flags,\r\ndaemon-&gt;local_ttl&#41;;\r\nread_write&#40;confd, packet, m + sizeof&#40;u16&#41;, 0&#41;&#41;;\r\n \r\nThe m variable is determined by a subtraction between the\r\nreturn of skip_questions&#40;&#41; and header pointer.\r\nThe return value of skip_question doesn&#39;t checked for error&#40;NULL&#41;.\r\nAs a result the negative value of pointer&#40;-header&#41;, might returned.\r\n \r\nsize_t setup_reply&#40;struct dns_header *header, size_t qlen,\r\nstruct all_addr *addrp, unsigned int flags, unsigned long ttl&#41;\r\n{\r\n unsigned char *p = skip_questions&#40;header, qlen&#41;\r\n return p - &#40;unsigned char *&#41;header\r\n}\r\n \r\nread_write checks if the size argument is positive. In case of a 32 bit\r\nsystem\r\nsize_t m would be 4 bytes and read_write will automatically exit. In case of\r\n64\r\nbit system size_t m is 8 bytes and may turn to positive if the sign bit of\r\nthe\r\n32 bit value is 0.\r\n \r\nIf m is less than 0xffffffff80000000, dnsmasq will be exploited by a\r\npotential attacker who will remotely read dnsmasq heap. If the above\r\ncondition is not met, dnsmasq exits properly.\r\n\r\nResearcher\r\n------------------------------------------------------------\r\nNick Sampanis &#40;n.sampanis[a t]obrela[do t]com&#41;\r\n\r\n\r\nVulnerability\r\n------------------------------------------------------------\r\nUnchecked return value CVE-2015-3294\r\n\r\nIdentification date:\r\n------------------------------------------------------------\r\n07/04/2015 - 09/04/2015\r\n\r\nSolution - fix &amp; patch\r\n------------------------------------------------------------\r\nPlease download dnsmasq-2.73rc4.tar.gz\r\n\r\nReference:\r\n------------------------------------------------------------\r\nhttp://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2015q2/009382.html\r\nhttps://www.obrela.com/home/security-labs/advisories/osi-advisory-osi-1502/\r\n\r\n", "edition": 1, "reporter": "Securityvulns", "published": "2015-05-05T00:00:00", "title": "Dnsmasq 2.72 Unchecked returned value", "type": "securityvulns", "enchantments": {"score": {"modified": "2018-08-31T11:10:58", "vector": "NONE", "value": 5.0}}, "bulletinFamily": "software", "affectedSoftware": [], "cvelist": ["CVE-2015-3294"], "modified": "2015-05-05T00:00:00", "id": "SECURITYVULNS:DOC:32005", "href": "https://vulners.com/securityvulns/SECURITYVULNS:DOC:32005", "cvss": {"score": 6.4, "vector": "AV:NETWORK/AC:LOW/Au:NONE/C:PARTIAL/I:NONE/A:PARTIAL/"}}, {"lastseen": "2018-08-31T11:10:58", "references": [], "description": "\r\n\r\n==========================================================================\r\nUbuntu Security Notice USN-2593-1\r\nMay 04, 2015\r\n\r\ndnsmasq vulnerability\r\n==========================================================================\r\n\r\nA security issue affects these releases of Ubuntu and its derivatives:\r\n\r\n- Ubuntu 15.04\r\n- Ubuntu 14.10\r\n- Ubuntu 14.04 LTS\r\n- Ubuntu 12.04 LTS\r\n\r\nSummary:\r\n\r\nDnsmasq could be made to crash or expose sensitive information if it\r\nreceived specially crafted network traffic.\r\n\r\nSoftware Description:\r\n- dnsmasq: Small caching DNS proxy and DHCP/TFTP server\r\n\r\nDetails:\r\n\r\nNick Sampanis discovered that Dnsmasq incorrectly handled certain malformed\r\nDNS requests. A remote attacker could use this issue to cause Dnsmasq to\r\ncrash, resulting in a denial of service, or possibly obtain sensitive\r\ninformation.\r\n\r\nUpdate instructions:\r\n\r\nThe problem can be corrected by updating your system to the following\r\npackage versions:\r\n\r\nUbuntu 15.04:\r\n dnsmasq-base 2.72-3ubuntu0.1\r\n\r\nUbuntu 14.10:\r\n dnsmasq-base 2.71-1ubuntu0.1\r\n\r\nUbuntu 14.04 LTS:\r\n dnsmasq-base 2.68-1ubuntu0.1\r\n\r\nUbuntu 12.04 LTS:\r\n dnsmasq 2.59-4ubuntu0.2\r\n dnsmasq-base 2.59-4ubuntu0.2\r\n dnsmasq-utils 2.59-4ubuntu0.2\r\n\r\nAfter a standard system update you need to reboot your computer to make\r\nall the necessary changes.\r\n\r\nReferences:\r\n http://www.ubuntu.com/usn/usn-2593-1\r\n CVE-2015-3294\r\n\r\nPackage Information:\r\n https://launchpad.net/ubuntu/+source/dnsmasq/2.72-3ubuntu0.1\r\n https://launchpad.net/ubuntu/+source/dnsmasq/2.71-1ubuntu0.1\r\n https://launchpad.net/ubuntu/+source/dnsmasq/2.68-1ubuntu0.1\r\n https://launchpad.net/ubuntu/+source/dnsmasq/2.59-4ubuntu0.2\r\n\r\n\r\n\r\n\r\n-- ubuntu-security-announce mailing list ubuntu-security-announce@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-security-announce\r\n\r\n", "edition": 1, "reporter": "Securityvulns", "published": "2015-05-04T00:00:00", "title": "[USN-2593-1] Dnsmasq vulnerability", "type": "securityvulns", "enchantments": {"score": {"modified": "2018-08-31T11:10:58", "vector": "NONE", "value": 5.0}}, "bulletinFamily": "software", "affectedSoftware": [], "cvelist": ["CVE-2015-3294"], "modified": "2015-05-04T00:00:00", "id": "SECURITYVULNS:DOC:31957", "href": "https://vulners.com/securityvulns/SECURITYVULNS:DOC:31957", "cvss": {"score": 6.4, "vector": "AV:NETWORK/AC:LOW/Au:NONE/C:PARTIAL/I:NONE/A:PARTIAL/"}}], "openvas": [{"lastseen": "2018-09-01T23:52:39", "references": ["http://www.debian.org/security/2015/dsa-3251.html"], "pluginID": "1361412562310703251", "description": "Nick Sampanis discovered that dnsmasq,\na small caching DNS proxy and DHCP/TFTP server, did not properly check the return\nvalue of the setup_reply() function called during a TCP connection, which is used\nthen as a size argument in a function which writes data on the client", "edition": 3, "reporter": "Copyright (c) 2015 Greenbone Networks GmbH http://greenbone.net", "published": "2015-05-05T00:00:00", "title": "Debian Security Advisory DSA 3251-1 (dnsmasq - security update)", "type": "openvas", "enchantments": {"score": {"vector": "NONE", "value": 5.0}}, "naslFamily": "Debian Local Security Checks", "bulletinFamily": "scanner", "cvelist": ["CVE-2015-3294"], "modified": "2018-04-06T00:00:00", "id": "OPENVAS:1361412562310703251", "href": "http://plugins.openvas.org/nasl.php?oid=1361412562310703251", "sourceData": "# OpenVAS Vulnerability Test\n# $Id: deb_3251.nasl 9355 2018-04-06 07:16:07Z cfischer $\n# Auto-generated from advisory DSA 3251-1 using nvtgen 1.0\n# Script version: 1.0\n#\n# Author:\n# Greenbone Networks\n#\n# Copyright:\n# Copyright (c) 2015 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. 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A remote attacker could exploit this issue via a specially\ncrafted DNS request to cause dnsmasq to crash, or potentially to obtain\nsensitive information from process memory.\n\nFor the oldstable distribution (wheezy), this problem has been fixed\nin version 2.62-3+deb7u2.\n\nFor the stable distribution (jessie), this problem has been fixed in\nversion 2.72-3+deb8u1.\n\nFor the testing distribution (stretch) and the unstable distribution\n(sid), this problem will be fixed soon.\n\nWe recommend that you upgrade your dnsmasq packages.\n\nFurther information about Debian Security Advisories, how to apply\nthese updates to your system and frequently asked questions can be\nfound at: https://www.debian.org/security/\n\nMailing list: debian-security-announce@lists.debian.org\n", "edition": 2, "reporter": "Debian", "published": "2015-05-05T15:39:55", "title": "[SECURITY] [DSA 3251-1] dnsmasq security update", "type": "debian", "enchantments": {"score": {"modified": "2018-10-18T13:48:27", 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"arch": "s390x", "operator": "lt"}, {"OS": "SUSE Linux Enterprise Debuginfo", "OSVersion": "11.4", "packageVersion": "2.78-0.17.5.1", "packageFilename": "dnsmasq-debugsource-2.78-0.17.5.1.ppc64.rpm", "packageName": "dnsmasq-debugsource", "arch": "ppc64", "operator": "lt"}, {"OS": "SUSE Linux Enterprise Debuginfo", "OSVersion": "11.4", "packageVersion": "2.78-0.17.5.1", "packageFilename": "dnsmasq-debugsource-2.78-0.17.5.1.i586.rpm", "packageName": "dnsmasq-debugsource", "arch": "i586", "operator": "lt"}], "description": "This update for dnsmasq fixes the following security issues:\n\n - CVE-2017-14491: 2 byte heap based overflow. [bsc#1060354]\n - CVE-2017-14492: heap based overflow. [bsc#1060355]\n - CVE-2017-14493: stack based overflow. [bsc#1060360]\n - CVE-2017-14494: DHCP - info leak. [bsc#1060361]\n - CVE-2017-14495: DNS - OOM DoS. [bsc#1060362]\n - CVE-2017-14496: DNS - DoS Integer underflow. [bsc#1060364]\n\n This update brings a (small) potential incompatibility in the handling of\n &quot;basename&quot; in --pxe-service. Please read the CHANGELOG and the\n documentation if you are using this option.\n\n", "edition": 1, "reporter": "Suse", "published": "2017-10-02T21:11:28", "enchantments": {"score": {"vector": "NONE", "value": 7.5}}, "title": "Security update for dnsmasq (important)", "type": "suse", "bulletinFamily": "unix", "cvelist": ["CVE-2017-14496", "CVE-2017-14494", "CVE-2017-14492", "CVE-2015-8899", "CVE-2017-14491", "CVE-2017-14493", "CVE-2017-14495", "CVE-2015-3294"], "modified": "2017-10-02T21:11:28", "href": "http://lists.opensuse.org/opensuse-security-announce/2017-10/msg00005.html", "id": "SUSE-SU-2017:2619-1", "cvss": {"score": 6.4, "vector": "AV:NETWORK/AC:LOW/Au:NONE/C:PARTIAL/I:NONE/A:PARTIAL/"}}, {"lastseen": "2017-10-02T23:53:52", "references": ["https://bugzilla.suse.com/1060362", "https://bugzilla.suse.com/1060355", "https://bugzilla.suse.com/1060361", "https://bugzilla.suse.com/1060364", "https://bugzilla.suse.com/1060360", "https://bugzilla.suse.com/1060354"], "affectedPackage": [{"OS": "SUSE Linux Enterprise Debuginfo", "OSVersion": "11.3", "packageVersion": "2.78-0.16.5.1", "packageFilename": "dnsmasq-debugsource-2.78-0.16.5.1.s390x.rpm", "packageName": "dnsmasq-debugsource", "arch": "s390x", "operator": "lt"}, {"OS": "SUSE Linux Enterprise Debuginfo", "OSVersion": "11.3", "packageVersion": "2.78-0.16.5.1", "packageFilename": "dnsmasq-debugsource-2.78-0.16.5.1.x86_64.rpm", "packageName": "dnsmasq-debugsource", "arch": "x86_64", "operator": "lt"}, {"OS": "SUSE Linux Enterprise Server LTSS", "OSVersion": "11.3", "packageVersion": "2.78-0.16.5.1", "packageFilename": "dnsmasq-2.78-0.16.5.1.x86_64.rpm", "packageName": "dnsmasq", "arch": "x86_64", "operator": "lt"}, {"OS": "SUSE Linux Enterprise Server LTSS", "OSVersion": "11.3", "packageVersion": "2.78-0.16.5.1", "packageFilename": "dnsmasq-2.78-0.16.5.1.i586.rpm", "packageName": "dnsmasq", "arch": "i586", "operator": "lt"}, {"OS": "SUSE Linux Enterprise Debuginfo", "OSVersion": "11.3", "packageVersion": "2.78-0.16.5.1", "packageFilename": "dnsmasq-debuginfo-2.78-0.16.5.1.s390x.rpm", "packageName": "dnsmasq-debuginfo", "arch": "s390x", "operator": "lt"}, {"OS": "SUSE Linux Enterprise Debuginfo", "OSVersion": "11.3", "packageVersion": "2.78-0.16.5.1", "packageFilename": "dnsmasq-debuginfo-2.78-0.16.5.1.x86_64.rpm", "packageName": "dnsmasq-debuginfo", "arch": "x86_64", "operator": "lt"}, {"OS": "SUSE Linux Enterprise Debuginfo", "OSVersion": "11.3", "packageVersion": "2.78-0.16.5.1", "packageFilename": "dnsmasq-debugsource-2.78-0.16.5.1.i586.rpm", "packageName": "dnsmasq-debugsource", "arch": "i586", "operator": "lt"}, {"OS": "SUSE Linux Enterprise Debuginfo", "OSVersion": "11.3", "packageVersion": "2.78-0.16.5.1", "packageFilename": "dnsmasq-debuginfo-2.78-0.16.5.1.i586.rpm", "packageName": "dnsmasq-debuginfo", "arch": "i586", "operator": "lt"}, {"OS": "SUSE Linux Enterprise Point of Sale", "OSVersion": "11.3", "packageVersion": "2.78-0.16.5.1", "packageFilename": "dnsmasq-2.78-0.16.5.1.i586.rpm", "packageName": "dnsmasq", "arch": "i586", "operator": "lt"}, {"OS": "SUSE Linux Enterprise Server LTSS", "OSVersion": "11.3", "packageVersion": "2.78-0.16.5.1", "packageFilename": "dnsmasq-2.78-0.16.5.1.s390x.rpm", "packageName": "dnsmasq", "arch": "s390x", "operator": "lt"}], "description": "This update for dnsmasq fixes the following security issues:\n\n - CVE-2017-14491: 2 byte heap based overflow. [bsc#1060354]\n - CVE-2017-14492: heap based overflow. [bsc#1060355]\n - CVE-2017-14493: stack based overflow. [bsc#1060360]\n - CVE-2017-14494: DHCP - info leak. [bsc#1060361]\n - CVE-2017-14495: DNS - OOM DoS. [bsc#1060362]\n - CVE-2017-14496: DNS - DoS Integer underflow. [bsc#1060364]\n\n This update brings a (small) potential incompatibility in the handling of\n &quot;basename&quot; in --pxe-service. Please read the CHANGELOG and the\n documentation if you are using this option.\n\n", "edition": 1, "reporter": "Suse", "published": "2017-10-02T21:09:17", "enchantments": {"score": {"vector": "NONE", "value": 7.5}}, "title": "Security update for dnsmasq (important)", "type": "suse", "bulletinFamily": "unix", "cvelist": ["CVE-2017-14496", "CVE-2017-14494", "CVE-2017-14492", "CVE-2015-8899", "CVE-2017-14491", "CVE-2017-14493", "CVE-2017-14495", "CVE-2015-3294"], "modified": "2017-10-02T21:09:17", "href": "http://lists.opensuse.org/opensuse-security-announce/2017-10/msg00004.html", "id": "SUSE-SU-2017:2617-1", "cvss": {"score": 6.4, "vector": "AV:NETWORK/AC:LOW/Au:NONE/C:PARTIAL/I:NONE/A:PARTIAL/"}}, {"lastseen": "2017-10-02T23:53:52", "references": ["https://bugzilla.suse.com/1060362", "https://bugzilla.suse.com/1060355", "https://bugzilla.suse.com/1060361", "https://bugzilla.suse.com/1060364", "https://bugzilla.suse.com/1035227", "https://bugzilla.suse.com/972164", "https://bugzilla.suse.com/902511", "https://bugzilla.suse.com/1060360", "https://bugzilla.suse.com/1060354", "https://bugzilla.suse.com/908137", "https://bugzilla.suse.com/904537"], "affectedPackage": [{"OS": "SUSE Linux Enterprise Server", "OSVersion": "12", "packageVersion": "2.78-6.6.1", "packageFilename": "dnsmasq-debuginfo-2.78-6.6.1.s390x.rpm", "packageName": "dnsmasq-debuginfo", "arch": "s390x", "operator": "lt"}, {"OS": "SUSE Linux Enterprise Server", "OSVersion": "12", "packageVersion": "2.78-6.6.1", "packageFilename": "dnsmasq-debugsource-2.78-6.6.1.x86_64.rpm", "packageName": "dnsmasq-debugsource", "arch": "x86_64", "operator": "lt"}, {"OS": "SUSE Linux Enterprise Server", "OSVersion": "12", "packageVersion": "2.78-6.6.1", "packageFilename": "dnsmasq-2.78-6.6.1.ppc64le.rpm", "packageName": "dnsmasq", "arch": "ppc64le", "operator": "lt"}, {"OS": "SUSE Linux Enterprise Server", "OSVersion": "12", "packageVersion": "2.78-6.6.1", "packageFilename": "dnsmasq-debuginfo-2.78-6.6.1.ppc64le.rpm", "packageName": "dnsmasq-debuginfo", "arch": "ppc64le", "operator": "lt"}, {"OS": "SUSE Linux Enterprise Server", "OSVersion": "12", "packageVersion": "2.78-6.6.1", "packageFilename": "dnsmasq-debugsource-2.78-6.6.1.ppc64le.rpm", "packageName": "dnsmasq-debugsource", "arch": "ppc64le", "operator": "lt"}, {"OS": "SUSE Linux Enterprise Server", "OSVersion": "12", "packageVersion": "2.78-6.6.1", "packageFilename": "dnsmasq-2.78-6.6.1.x86_64.rpm", "packageName": "dnsmasq", "arch": "x86_64", "operator": "lt"}, {"OS": "SUSE Linux Enterprise Server", "OSVersion": "12", "packageVersion": "2.78-6.6.1", "packageFilename": "dnsmasq-debuginfo-2.78-6.6.1.x86_64.rpm", "packageName": "dnsmasq-debuginfo", "arch": "x86_64", "operator": "lt"}, {"OS": "SUSE Linux Enterprise Server", "OSVersion": "12", "packageVersion": "2.78-6.6.1", "packageFilename": "dnsmasq-debugsource-2.78-6.6.1.s390x.rpm", "packageName": "dnsmasq-debugsource", "arch": "s390x", "operator": "lt"}, {"OS": "SUSE Linux Enterprise Server", "OSVersion": "12", "packageVersion": "2.78-6.6.1", "packageFilename": "dnsmasq-2.78-6.6.1.s390x.rpm", "packageName": "dnsmasq", "arch": "s390x", "operator": "lt"}], "description": "This update for dnsmasq fixes the following issues.\n\n Remedy the following security issues:\n\n - CVE-2017-14491: 2 byte heap based overflow. [bsc#1060354]\n - CVE-2017-14492: heap based overflow. [bsc#1060355]\n - CVE-2017-14493: stack based overflow. [bsc#1060360]\n - CVE-2017-14494: DHCP - info leak. [bsc#1060361]\n - CVE-2017-14495: DNS - OOM DoS. [bsc#1060362]\n - CVE-2017-14496: DNS - DoS Integer underflow. [bsc#1060364]\n - Prevent a man-in-the-middle attack (bsc#972164, fate#321175).\n\n Furthermore, the following issues have been fixed:\n\n - Fix DHCP relaying, broken in 2.76 and 2.77.\n - Update to version 2.78 (fate#321175, fate#322030, bsc#1035227).\n - Fix PXE booting for UEFI architectures (fate#322030).\n - Drop PrivateDevices=yes which breaks logging (bsc#902511, bsc#904537)\n - Build with support for DNSSEC (fate#318323, bsc#908137).\n\n Please note that this update brings a (small) potential incompatibility in\n the handling of &quot;basename&quot; in --pxe-service. Please read the CHANGELOG and\n the documentation if you are using this option.\n\n", "edition": 1, "reporter": "Suse", "published": "2017-10-02T21:07:18", "enchantments": {"score": {"vector": "NONE", "value": 7.5}}, "title": "Security update for dnsmasq (important)", "type": "suse", "bulletinFamily": "unix", "cvelist": ["CVE-2017-14496", "CVE-2017-14494", "CVE-2017-14492", "CVE-2015-8899", "CVE-2017-14491", "CVE-2017-14493", "CVE-2017-14495", "CVE-2015-3294"], "modified": "2017-10-02T21:07:18", "href": "http://lists.opensuse.org/opensuse-security-announce/2017-10/msg00003.html", "id": "SUSE-SU-2017:2616-1", "cvss": {"score": 6.4, "vector": "AV:NETWORK/AC:LOW/Au:NONE/C:PARTIAL/I:NONE/A:PARTIAL/"}}]}