USN-3377-1: Linux kernel vulnerabilities

Releases

• Ubuntu 17.04

Packages

• linux - Linux kernel
• linux-raspi2 - Linux kernel for Raspberry Pi 2

Details

Fan Wu and Shixiong Zhao discovered a race condition between inotify events
and vfs rename operations in the Linux kernel. An unprivileged local
attacker could use this to cause a denial of service (system crash) or
execute arbitrary code. (CVE-2017-7533)

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)

李强 discovered that the Virtio GPU driver in the Linux kernel did not
properly free memory in some situations. A local attacker could use this to
cause a denial of service (memory consumption). (CVE-2017-10810)

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 17.04

• linux-image-generic - 4.10.0.30.31
• linux-image-4.10.0-30-lowlatency - 4.10.0-30.34
• linux-image-generic-lpae - 4.10.0.30.31
• linux-image-4.10.0-30-generic - 4.10.0-30.34
• linux-image-4.10.0-30-generic-lpae - 4.10.0-30.34
• linux-image-4.10.0-1013-raspi2 - 4.10.0-1013.16
• linux-image-lowlatency - 4.10.0.30.31
• linux-image-raspi2 - 4.10.0.1013.15

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-2017-1000365
• CVE-2017-10810
• CVE-2017-7482
• CVE-2017-7533

Related notices

• USN-3377-2: linux-image-4.10.0-30-generic-lpae, linux-image-4.10.0-30-lowlatency, linux-image-extra-4.10.0-30-generic, linux-image-4.10.0-30-generic, linux-hwe
• USN-3381-1: linux-image-3.13.0-126-powerpc64-smp, linux-image-3.13.0-126-powerpc-smp, linux-image-3.13.0-126-powerpc-e500mc, linux-image-3.13.0-126-generic-lpae, linux-image-3.13.0-126-powerpc-e500, linux-image-3.13.0-126-generic, linux-image-extra-3.13.0-126-generic, linux, linux-image-3.13.0-126-lowlatency, linux-image-3.13.0-126-powerpc64-emb
• USN-3378-1: linux-gke, linux-image-4.4.0-89-lowlatency, linux-snapdragon, linux-aws, linux-image-4.4.0-1028-aws, linux-image-4.4.0-1069-snapdragon, linux-image-4.4.0-89-generic, linux-image-4.4.0-89-powerpc-e500mc, linux-image-4.4.0-89-generic-lpae, linux-image-4.4.0-89-powerpc64-emb, linux-image-extra-4.4.0-89-generic, linux-raspi2, linux-image-extra-4.4.0-1024-gke, linux, linux-image-4.4.0-89-powerpc64-smp, linux-image-4.4.0-89-powerpc-smp, linux-image-4.4.0-1024-gke, linux-image-4.4.0-1067-raspi2
• USN-3378-2: linux-image-4.4.0-89-lowlatency, linux-image-4.4.0-89-generic, linux-image-4.4.0-89-powerpc-e500mc, linux-image-4.4.0-89-powerpc64-emb, linux-image-4.4.0-89-generic-lpae, linux-image-extra-4.4.0-89-generic, linux-image-4.4.0-89-powerpc64-smp, linux-image-4.4.0-89-powerpc-smp, linux-lts-xenial
• USN-3381-2: linux-image-3.13.0-126-generic-lpae, linux-image-3.13.0-126-generic, linux-lts-trusty, linux-image-generic-lpae-lts-trusty, linux-image-generic-lts-trusty