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Ubuntu: (Multiple Advisories) (CVE-2018-12896): Linux kernel (Trusty HWE) vulnerabilities

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Ubuntu: (Multiple Advisories) (CVE-2018-12896): Linux kernel (Trusty HWE) vulnerabilities

Severity
2
CVSS
(AV:L/AC:L/Au:N/C:N/I:N/A:P)
Published
07/02/2018
Created
03/19/2019
Added
01/11/2019
Modified
08/25/2021

Description

An issue was discovered in the Linux kernel through 4.17.3. An Integer Overflow in kernel/time/posix-timers.c in the POSIX timer code is caused by the way the overrun accounting works. Depending on interval and expiry time values, the overrun can be larger than INT_MAX, but the accounting is int based. This basically makes the accounting values, which are visible to user space via timer_getoverrun(2) and siginfo::si_overrun, random. For example, a local user can cause a denial of service (signed integer overflow) via crafted mmap, futex, timer_create, and timer_settime system calls.

Solution(s)

  • ubuntu-upgrade-linux-image-3-13-0-164-generic
  • ubuntu-upgrade-linux-image-3-13-0-164-generic-lpae
  • ubuntu-upgrade-linux-image-3-13-0-164-lowlatency
  • ubuntu-upgrade-linux-image-3-13-0-164-powerpc-e500
  • ubuntu-upgrade-linux-image-3-13-0-164-powerpc-e500mc
  • ubuntu-upgrade-linux-image-3-13-0-164-powerpc-smp
  • ubuntu-upgrade-linux-image-3-13-0-164-powerpc64-emb
  • ubuntu-upgrade-linux-image-3-13-0-164-powerpc64-smp
  • ubuntu-upgrade-linux-image-4-15-0-1026-gcp
  • ubuntu-upgrade-linux-image-4-15-0-1028-kvm
  • ubuntu-upgrade-linux-image-4-15-0-1030-oem
  • ubuntu-upgrade-linux-image-4-15-0-1030-raspi2
  • ubuntu-upgrade-linux-image-4-15-0-1031-aws
  • ubuntu-upgrade-linux-image-4-15-0-1036-azure
  • ubuntu-upgrade-linux-image-4-15-0-43-generic
  • ubuntu-upgrade-linux-image-4-15-0-43-generic-lpae
  • ubuntu-upgrade-linux-image-4-15-0-43-lowlatency
  • ubuntu-upgrade-linux-image-4-15-0-43-snapdragon
  • ubuntu-upgrade-linux-image-4-4-0-1037-aws
  • ubuntu-upgrade-linux-image-4-4-0-1039-kvm
  • ubuntu-upgrade-linux-image-4-4-0-1074-aws
  • ubuntu-upgrade-linux-image-4-4-0-1102-raspi2
  • ubuntu-upgrade-linux-image-4-4-0-1106-snapdragon
  • ubuntu-upgrade-linux-image-4-4-0-141-generic
  • ubuntu-upgrade-linux-image-4-4-0-141-generic-lpae
  • ubuntu-upgrade-linux-image-4-4-0-141-lowlatency
  • ubuntu-upgrade-linux-image-4-4-0-141-powerpc-e500mc
  • ubuntu-upgrade-linux-image-4-4-0-141-powerpc-smp
  • ubuntu-upgrade-linux-image-4-4-0-141-powerpc64-emb
  • ubuntu-upgrade-linux-image-4-4-0-141-powerpc64-smp
  • ubuntu-upgrade-linux-image-aws
  • ubuntu-upgrade-linux-image-aws-hwe
  • ubuntu-upgrade-linux-image-azure
  • ubuntu-upgrade-linux-image-gcp
  • ubuntu-upgrade-linux-image-generic
  • ubuntu-upgrade-linux-image-generic-hwe-16-04
  • ubuntu-upgrade-linux-image-generic-lpae
  • ubuntu-upgrade-linux-image-generic-lpae-hwe-16-04
  • ubuntu-upgrade-linux-image-generic-lpae-lts-trusty
  • ubuntu-upgrade-linux-image-generic-lpae-lts-xenial
  • ubuntu-upgrade-linux-image-generic-lts-trusty
  • ubuntu-upgrade-linux-image-generic-lts-xenial
  • ubuntu-upgrade-linux-image-gke
  • ubuntu-upgrade-linux-image-kvm
  • ubuntu-upgrade-linux-image-lowlatency
  • ubuntu-upgrade-linux-image-lowlatency-hwe-16-04
  • ubuntu-upgrade-linux-image-lowlatency-lts-xenial
  • ubuntu-upgrade-linux-image-oem
  • ubuntu-upgrade-linux-image-powerpc-e500
  • ubuntu-upgrade-linux-image-powerpc-e500mc
  • ubuntu-upgrade-linux-image-powerpc-e500mc-lts-xenial
  • ubuntu-upgrade-linux-image-powerpc-smp
  • ubuntu-upgrade-linux-image-powerpc-smp-lts-xenial
  • ubuntu-upgrade-linux-image-powerpc64-emb
  • ubuntu-upgrade-linux-image-powerpc64-emb-lts-xenial
  • ubuntu-upgrade-linux-image-powerpc64-smp
  • ubuntu-upgrade-linux-image-powerpc64-smp-lts-xenial
  • ubuntu-upgrade-linux-image-raspi2
  • ubuntu-upgrade-linux-image-snapdragon

References

  • USN-3776-1
  • USN-3776-2
  • USN-3797-1
  • USN-3797-2
  • USN-3846-1
  • USN-3847-1
  • USN-3847-2
  • USN-3847-3
  • USN-3848-1
  • USN-3848-2
  • USN-3849-1
  • USN-3849-2
  • CVE-2018-12896
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