USN-3581-3: Linux kernel (Raspberry Pi 2) vulnerabilities

Releases

• Ubuntu 17.10

Packages

• linux-raspi2 - Linux kernel for Raspberry Pi 2

Details

Mohamed Ghannam discovered that the IPv4 raw socket implementation in the
Linux kernel contained a race condition leading to uninitialized pointer
usage. A local attacker could use this to cause a denial of service or
possibly execute arbitrary code. (CVE-2017-17712)

ChunYu Wang discovered that a use-after-free vulnerability existed in the
SCTP protocol implementation in the Linux kernel. A local attacker could
use this to cause a denial of service (system crash) or possibly execute
arbitrary code, (CVE-2017-15115)

Mohamed Ghannam discovered a use-after-free vulnerability in the DCCP
protocol implementation in the Linux kernel. A local attacker could use
this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2017-8824)

Update instructions

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

Ubuntu 17.10

• linux-image-4.13.0-1014-raspi2 - 4.13.0-1014.15
• linux-image-raspi2 - 4.13.0.1014.12

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-2017-15115
• CVE-2017-17712
• CVE-2017-8824

Related notices

• USN-3583-2: linux-image-generic-lts-trusty, linux-image-3.13.0-142-generic-lpae, linux-image-generic-lpae-lts-trusty, linux-image-3.13.0-142-generic, linux-lts-trusty
• USN-3581-1: linux, linux-image-generic-lpae, linux-image-4.13.0-36-lowlatency, linux-image-4.13.0-36-generic, linux-image-4.13.0-36-generic-lpae, linux-image-generic, linux-image-lowlatency
• USN-3582-2: linux-image-4.4.0-1014-aws, linux-image-4.4.0-116-generic-lpae, linux-aws, linux-image-extra-4.4.0-116-generic, linux-image-4.4.0-116-lowlatency, linux-image-4.4.0-116-powerpc64-smp, linux-image-4.4.0-116-generic, linux-image-4.4.0-116-powerpc64-emb, linux-image-4.4.0-116-powerpc-smp, linux-lts-xenial, linux-image-4.4.0-116-powerpc-e500mc
• USN-3582-1: linux, linux-image-4.4.0-1052-aws, linux-image-4.4.0-116-generic-lpae, linux-kvm, linux-raspi2, linux-snapdragon, linux-aws, linux-image-extra-4.4.0-116-generic, linux-image-4.4.0-1087-snapdragon, linux-image-4.4.0-116-lowlatency, linux-image-4.4.0-116-powerpc-e500mc, linux-image-4.4.0-116-generic, linux-image-4.4.0-116-powerpc64-smp, linux-image-4.4.0-116-powerpc64-emb, linux-image-4.4.0-116-powerpc-smp, linux-image-4.4.0-1085-raspi2, linux-image-4.4.0-1019-kvm
• USN-3583-1: linux, linux-image-extra-3.13.0-142-generic, linux-image-3.13.0-142-powerpc-smp, linux-image-3.13.0-142-powerpc-e500, linux-image-3.13.0-142-powerpc-e500mc, linux-image-3.13.0-142-lowlatency, linux-image-3.13.0-142-generic-lpae, linux-image-3.13.0-142-powerpc64-emb, linux-image-3.13.0-142-powerpc64-smp, linux-image-3.13.0-142-generic
• USN-3581-2: linux-image-extra-4.13.0-36-generic, linux-image-4.13.0-1011-azure, linux-image-4.13.0-1011-gcp, linux-image-4.13.0-36-lowlatency, linux-hwe, linux-image-extra-4.13.0-1011-gcp, linux-oem, linux-image-4.13.0-36-generic, linux-gcp, linux-image-extra-4.13.0-1011-azure, linux-azure, linux-image-4.13.0-36-generic-lpae, linux-image-4.13.0-1021-oem