USN-3381-1: Linux kernel vulnerabilities

Releases

• Ubuntu 14.04 ESM

Packages

• linux - Linux kernel

Details

Peter Pi discovered that the colormap handling for frame buffer devices in
the Linux kernel contained an integer overflow. A local attacker could use
this to disclose sensitive information (kernel memory). (CVE-2016-8405)

It was discovered that the Linux kernel did not properly restrict
RLIMIT_STACK size. A local attacker could use this in conjunction with
another vulnerability to possibly execute arbitrary code.
(CVE-2017-1000365)

It was discovered that SELinux in the Linux kernel did not properly handle
empty writes to /proc/pid/attr. A local attacker could use this to cause a
denial of service (system crash). (CVE-2017-2618)

石磊 discovered that the RxRPC Kerberos 5 ticket handling code in the
Linux kernel did not properly verify metadata. A remote attacker could use
this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2017-7482)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 14.04

• linux-image-3.13.0-126-generic - 3.13.0-126.175
• linux-image-3.13.0-126-generic-lpae - 3.13.0-126.175
• linux-image-3.13.0-126-lowlatency - 3.13.0-126.175
• linux-image-3.13.0-126-powerpc-e500 - 3.13.0-126.175
• linux-image-3.13.0-126-powerpc-e500mc - 3.13.0-126.175
• linux-image-3.13.0-126-powerpc-smp - 3.13.0-126.175
• linux-image-3.13.0-126-powerpc64-emb - 3.13.0-126.175
• linux-image-3.13.0-126-powerpc64-smp - 3.13.0-126.175

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References

• CVE-2016-8405
• CVE-2017-1000365
• CVE-2017-2618
• CVE-2017-7482

Related notices

• USN-3361-1: linux-image-4.10.0-27-generic, linux-hwe, linux-image-4.10.0-27-generic-lpae, linux-image-4.10.0-27-lowlatency, linux-image-extra-4.10.0-27-generic
• USN-3381-2: linux-image-3.13.0-126-generic, linux-image-generic-lpae-lts-trusty, linux-image-3.13.0-126-generic-lpae, linux-image-generic-lts-trusty, linux-lts-trusty
• USN-3377-2: linux-image-4.10.0-30-generic-lpae, linux-hwe, linux-image-4.10.0-30-generic, linux-image-4.10.0-30-lowlatency, linux-image-extra-4.10.0-30-generic
• USN-3377-1: linux, linux-image-generic-lpae, linux-image-4.10.0-30-generic-lpae, linux-image-4.10.0-30-generic, linux-raspi2, linux-image-4.10.0-30-lowlatency, linux-image-raspi2, linux-image-4.10.0-1013-raspi2, linux-image-generic, linux-image-lowlatency
• USN-3378-1: linux, linux-image-4.4.0-89-powerpc-e500mc, linux-image-4.4.0-1069-snapdragon, linux-image-4.4.0-89-generic-lpae, linux-image-4.4.0-1067-raspi2, linux-image-4.4.0-89-powerpc64-smp, linux-image-4.4.0-89-powerpc64-emb, linux-raspi2, linux-snapdragon, linux-image-extra-4.4.0-89-generic, linux-image-extra-4.4.0-1024-gke, linux-gke, linux-aws, linux-image-4.4.0-89-lowlatency, linux-image-4.4.0-89-powerpc-smp, linux-image-4.4.0-1024-gke, linux-image-4.4.0-1028-aws, linux-image-4.4.0-89-generic
• USN-3378-2: linux-image-4.4.0-89-powerpc-e500mc, linux-image-4.4.0-89-generic-lpae, linux-image-4.4.0-89-powerpc64-smp, linux-image-4.4.0-89-powerpc64-emb, linux-image-extra-4.4.0-89-generic, linux-image-4.4.0-89-lowlatency, linux-image-4.4.0-89-powerpc-smp, linux-lts-xenial, linux-image-4.4.0-89-generic