Medium: kernel

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)

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-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  

Additional References

Red Hat: CVE-2015-2925, CVE-2015-7613, CVE-2015-8787, CVE-2017-1000253

Mitre: CVE-2015-2925, CVE-2015-7613, CVE-2015-8787, CVE-2017-1000253