ALAS-2015-603

References: CVE-2015-2925  CVE-2015-7613  CVE-2015-8787  CVE-2017-1000253 
FAQs regarding Amazon Linux ALAS/CVE Severity

Issue Overview:

A race condition in the IPC object implementation in the Linux kernel through 4.2.3 allows local users to gain privileges by triggering an ipc_addid call that leads to uid and gid comparisons against uninitialized data, related to msg.c, shm.c, and util.c. (CVE-2015-7613)

Linux kernels built with the name spaces support(CONFIG_NAMESPACE) is vulnerable to a potential privilege escalation flaw. It could occur when a process within a container escapes the intended bind mounts to access the full file system. A privileged user inside a container could use this flaw to potentially gain full privileges on a system. (CVE-2015-2925)

A NULL-pointer dereference vulnerability was found in the Linux kernel's TCP stack, in net/netfilter/nf_nat_redirect.c in the nf_nat_redirect_ipv4() function. A remote, unauthenticated user could exploit this flaw to create a system crash (denial of service). (CVE-2015-8787)

Issue Correction:
Run yum update kernel or yum update --advisory ALAS-2015-603 to update your system.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-debuginfo-common-i686-4.1.10-17.31.amzn1.i686
    kernel-tools-debuginfo-4.1.10-17.31.amzn1.i686
    perf-debuginfo-4.1.10-17.31.amzn1.i686
    kernel-devel-4.1.10-17.31.amzn1.i686
    kernel-4.1.10-17.31.amzn1.i686
    kernel-headers-4.1.10-17.31.amzn1.i686
    perf-4.1.10-17.31.amzn1.i686
    kernel-debuginfo-4.1.10-17.31.amzn1.i686
    kernel-tools-4.1.10-17.31.amzn1.i686
    kernel-tools-devel-4.1.10-17.31.amzn1.i686

noarch:
    kernel-doc-4.1.10-17.31.amzn1.noarch

src:
    kernel-4.1.10-17.31.amzn1.src

x86_64:
    kernel-tools-devel-4.1.10-17.31.amzn1.x86_64
    perf-debuginfo-4.1.10-17.31.amzn1.x86_64
    kernel-debuginfo-4.1.10-17.31.amzn1.x86_64
    kernel-tools-4.1.10-17.31.amzn1.x86_64
    kernel-4.1.10-17.31.amzn1.x86_64
    kernel-tools-debuginfo-4.1.10-17.31.amzn1.x86_64
    kernel-headers-4.1.10-17.31.amzn1.x86_64
    perf-4.1.10-17.31.amzn1.x86_64
    kernel-debuginfo-common-x86_64-4.1.10-17.31.amzn1.x86_64
    kernel-devel-4.1.10-17.31.amzn1.x86_64