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Medium: kernel

Description

**Issue Overview:** The Linux kernel before 4.4.1 allows local users to bypass file-descriptor limits and cause a denial of service (memory consumption) by sending each descriptor over a UNIX socket before closing it, related to net/unix/af_unix.c and net/unix/garbage.c. (CVE-2013-4312) A race condition in the tty_ioctl function in drivers/tty/tty_io.c in the Linux kernel through 4.4.1 was found that allows local users to obtain sensitive information from kernel memory or cause a denial of service (use-after-free and system crash) by making a TIOCGETD ioctl call during processing of a TIOCSETD ioctl call. (CVE-2016-0723) A privilege-escalation vulnerability was discovered in the Linux kernel built with User Namespace (CONFIG_USER_NS) support. The flaw occurred when the ptrace() system call was used on a root-owned process to enter a user namespace. A privileged namespace user could exploit this flaw to potentially escalate their privileges on the system, outside the original namespace. (CVE-2015-8709) net/sctp/sm_sideeffect.c in the Linux kernel before 4.3 does not properly manage the relationship between a lock and a socket, which allows local users to cause a denial of service (deadlock) via a crafted sctp_accept call. (CVE-2015-8767) **Affected Packages:** kernel **Issue Correction:** Run _yum clean all_ followed by _yum update kernel_ to update your system. You will need to reboot your system in order for the new kernel to be running. **New Packages:** i686:     kernel-tools-debuginfo-4.1.17-22.30.amzn1.i686     kernel-devel-4.1.17-22.30.amzn1.i686     perf-4.1.17-22.30.amzn1.i686     perf-debuginfo-4.1.17-22.30.amzn1.i686     kernel-tools-4.1.17-22.30.amzn1.i686     kernel-headers-4.1.17-22.30.amzn1.i686     kernel-debuginfo-common-i686-4.1.17-22.30.amzn1.i686     kernel-debuginfo-4.1.17-22.30.amzn1.i686     kernel-4.1.17-22.30.amzn1.i686     kernel-tools-devel-4.1.17-22.30.amzn1.i686 noarch:     kernel-doc-4.1.17-22.30.amzn1.noarch src:     kernel-4.1.17-22.30.amzn1.src x86_64:     kernel-debuginfo-4.1.17-22.30.amzn1.x86_64     kernel-devel-4.1.17-22.30.amzn1.x86_64     kernel-4.1.17-22.30.amzn1.x86_64     kernel-tools-4.1.17-22.30.amzn1.x86_64     perf-debuginfo-4.1.17-22.30.amzn1.x86_64     kernel-tools-devel-4.1.17-22.30.amzn1.x86_64     kernel-debuginfo-common-x86_64-4.1.17-22.30.amzn1.x86_64     kernel-tools-debuginfo-4.1.17-22.30.amzn1.x86_64     perf-4.1.17-22.30.amzn1.x86_64     kernel-headers-4.1.17-22.30.amzn1.x86_64 ### Additional References Red Hat: [CVE-2013-4312](<https://access.redhat.com/security/cve/CVE-2013-4312>), [CVE-2015-8709](<https://access.redhat.com/security/cve/CVE-2015-8709>), [CVE-2015-8767](<https://access.redhat.com/security/cve/CVE-2015-8767>), [CVE-2016-0723](<https://access.redhat.com/security/cve/CVE-2016-0723>) Mitre: [CVE-2013-4312](<https://vulners.com/cve/CVE-2013-4312>), [CVE-2015-8709](<https://vulners.com/cve/CVE-2015-8709>), [CVE-2015-8767](<https://vulners.com/cve/CVE-2015-8767>), [CVE-2016-0723](<https://vulners.com/cve/CVE-2016-0723>)


Affected Package


OS OS Version Package Name Package Version
Amazon Linux 1 kernel-tools-debuginfo 4.1.17-22.30.amzn1
Amazon Linux 1 kernel-devel 4.1.17-22.30.amzn1
Amazon Linux 1 perf 4.1.17-22.30.amzn1
Amazon Linux 1 perf-debuginfo 4.1.17-22.30.amzn1
Amazon Linux 1 kernel-tools 4.1.17-22.30.amzn1
Amazon Linux 1 kernel-headers 4.1.17-22.30.amzn1
Amazon Linux 1 kernel-debuginfo-common-i686 4.1.17-22.30.amzn1
Amazon Linux 1 kernel-debuginfo 4.1.17-22.30.amzn1
Amazon Linux 1 kernel 4.1.17-22.30.amzn1
Amazon Linux 1 kernel-tools-devel 4.1.17-22.30.amzn1
Amazon Linux 1 kernel-doc 4.1.17-22.30.amzn1
Amazon Linux 1 kernel 4.1.17-22.30.amzn1
Amazon Linux 1 kernel-debuginfo 4.1.17-22.30.amzn1
Amazon Linux 1 kernel-devel 4.1.17-22.30.amzn1
Amazon Linux 1 kernel 4.1.17-22.30.amzn1
Amazon Linux 1 kernel-tools 4.1.17-22.30.amzn1
Amazon Linux 1 perf-debuginfo 4.1.17-22.30.amzn1
Amazon Linux 1 kernel-tools-devel 4.1.17-22.30.amzn1
Amazon Linux 1 kernel-debuginfo-common-x86_64 4.1.17-22.30.amzn1
Amazon Linux 1 kernel-tools-debuginfo 4.1.17-22.30.amzn1
Amazon Linux 1 perf 4.1.17-22.30.amzn1
Amazon Linux 1 kernel-headers 4.1.17-22.30.amzn1

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