CVE-2018-12896
Published: 2 July 2018
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.
From the Ubuntu Security Team
It was discovered that an integer overrun vulnerability existed in the POSIX timers implementation in the Linux kernel. A local attacker could use this to cause a denial of service.
Priority
Status
Package | Release | Status |
---|---|---|
linux Launchpad, Ubuntu, Debian |
artful |
Ignored
(reached end-of-life)
|
bionic |
Released
(4.15.0-43.46)
|
|
cosmic |
Not vulnerable
(4.18.0-9.10)
|
|
trusty |
Released
(3.13.0-164.214)
|
|
upstream |
Released
(4.19~rc1)
|
|
xenial |
Released
(4.4.0-141.167)
|
|
Patches: Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 |
||
linux-aws Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Released
(4.15.0-1031.33)
|
|
cosmic |
Not vulnerable
(4.18.0-1002.3)
|
|
trusty |
Released
(4.4.0-1037.40)
|
|
upstream |
Released
(4.19~rc1)
|
|
xenial |
Released
(4.4.0-1074.84)
|
|
linux-aws-hwe Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.19~rc1)
|
|
xenial |
Released
(4.15.0-1031.33~16.04.1)
|
|
linux-azure Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Released
(4.15.0-1036.38)
|
|
cosmic |
Not vulnerable
(4.18.0-1003.3)
|
|
trusty |
Released
(4.15.0-1036.38~14.04.2)
|
|
upstream |
Released
(4.19~rc1)
|
|
xenial |
Released
(4.15.0-1036.38~16.04.1)
|
|
linux-azure-edge Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Not vulnerable
(4.18.0-1006.6~18.04.1)
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.19~rc1)
|
|
xenial |
Released
(4.18.0-1006.6~16.04.2)
|
|
linux-euclid Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.19~rc1)
|
|
xenial |
Ignored
(was needed ESM criteria)
|
|
linux-flo Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(4.19~rc1)
|
|
xenial |
Ignored
(abandoned)
|
|
linux-gcp Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Released
(4.15.0-1026.27)
|
|
cosmic |
Not vulnerable
(4.18.0-1002.3)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.19~rc1)
|
|
xenial |
Released
(4.15.0-1026.27~16.04.1)
|
|
linux-gcp-edge Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.18.0-1004.5~18.04.1)
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.19~rc1)
|
|
xenial |
Does not exist
|
|
linux-gke Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.19~rc1)
|
|
xenial |
Ignored
(end-of-life)
|
|
linux-goldfish Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(4.19~rc1)
|
|
xenial |
Ignored
(end-of-life)
|
|
linux-grouper Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(4.19~rc1)
|
|
xenial |
Does not exist
|
|
linux-hwe Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Not vulnerable
(4.18.0-13.14~18.04.1)
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.19~rc1)
|
|
xenial |
Released
(4.15.0-43.46~16.04.1)
|
|
linux-hwe-edge Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Not vulnerable
(4.18.0-13.14~18.04.1)
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.19~rc1)
|
|
xenial |
Released
(4.15.0-43.46~16.04.1)
|
|
linux-kvm Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Released
(4.15.0-1028.28)
|
|
cosmic |
Not vulnerable
(4.18.0-1003.3)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.19~rc1)
|
|
xenial |
Released
(4.4.0-1039.45)
|
|
linux-lts-trusty Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.19~rc1)
|
|
xenial |
Does not exist
|
|
linux-lts-utopic Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [out of standard support])
|
|
upstream |
Released
(4.19~rc1)
|
|
xenial |
Does not exist
|
|
linux-lts-vivid Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [out of standard support])
|
|
upstream |
Released
(4.19~rc1)
|
|
xenial |
Does not exist
|
|
linux-lts-wily Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [out of standard support])
|
|
upstream |
Released
(4.19~rc1)
|
|
xenial |
Does not exist
|
|
linux-lts-xenial Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Released
(4.4.0-141.167~14.04.1)
|
|
upstream |
Released
(4.19~rc1)
|
|
xenial |
Does not exist
|
|
linux-maguro Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(4.19~rc1)
|
|
xenial |
Does not exist
|
|
linux-mako Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(4.19~rc1)
|
|
xenial |
Ignored
(abandoned)
|
|
linux-manta Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(4.19~rc1)
|
|
xenial |
Does not exist
|
|
linux-oem Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Released
(4.15.0-1030.35)
|
|
cosmic |
Released
(4.15.0-1030.35)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.19~rc1)
|
|
xenial |
Ignored
(was needed now end-of-life)
|
|
linux-oracle Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1007.9)
|
cosmic |
Not vulnerable
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.19~rc1)
|
|
xenial |
Not vulnerable
(4.15.0-1007.9~16.04.1)
|
|
linux-raspi2 Launchpad, Ubuntu, Debian |
artful |
Ignored
(reached end-of-life)
|
bionic |
Released
(4.15.0-1030.32)
|
|
cosmic |
Not vulnerable
(4.18.0-1005.7)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.19~rc1)
|
|
xenial |
Released
(4.4.0-1102.110)
|
|
linux-snapdragon Launchpad, Ubuntu, Debian |
artful |
Ignored
(reached end-of-life)
|
bionic |
Not vulnerable
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.19~rc1)
|
|
xenial |
Released
(4.4.0-1106.111)
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 5.5 |
Attack vector | Local |
Attack complexity | Low |
Privileges required | Low |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | High |
Vector | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12896
- https://bugzilla.kernel.org/show_bug.cgi?id=200189
- https://github.com/lcytxw/bug_repro/tree/master/bug_200189
- https://github.com/torvalds/linux/commit/78c9c4dfbf8c04883941445a195276bb4bb92c76
- https://ubuntu.com/security/notices/USN-3847-1
- https://ubuntu.com/security/notices/USN-3847-2
- https://ubuntu.com/security/notices/USN-3847-3
- https://ubuntu.com/security/notices/USN-3848-1
- https://ubuntu.com/security/notices/USN-3848-2
- https://ubuntu.com/security/notices/USN-3849-1
- https://ubuntu.com/security/notices/USN-3849-2
- NVD
- Launchpad
- Debian