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CVE-2018-12896

Status Candidate

Overview

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.

Related Files

Slackware Security Advisory - Slackware 14.2 kernel Updates
Posted Jan 31, 2019
Authored by Slackware Security Team | Site slackware.com

Slackware Security Advisory - New kernel packages are available for Slackware 14.2 to fix security issues.

tags | advisory, kernel
systems | linux, slackware
advisories | CVE-2017-18241, CVE-2017-18249, CVE-2018-10880, CVE-2018-1120, CVE-2018-12896, CVE-2018-13053, CVE-2018-13096, CVE-2018-13097, CVE-2018-13099, CVE-2018-13100, CVE-2018-14610, CVE-2018-14611, CVE-2018-14612, CVE-2018-14613, CVE-2018-14614, CVE-2018-14616, CVE-2018-14633, CVE-2018-16862, CVE-2018-16884, CVE-2018-17972, CVE-2018-18021, CVE-2018-18281, CVE-2018-18690, CVE-2018-18710, CVE-2018-19824, CVE-2018-19985
SHA-256 | b00c9750a9d1a5293cf1b00be4962a74b7a8b39c5ae241b16f2e5d2e209b667b
Ubuntu Security Notice USN-3849-1
Posted Dec 21, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3849-1 - It was discovered that a NULL pointer dereference existed in the keyring subsystem of the Linux kernel. A local attacker could use this to cause a denial of service. It was discovered that a race condition existed in the raw MIDI driver for the Linux kernel, leading to a double free vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2017-2647, CVE-2018-10902, CVE-2018-12896, CVE-2018-14734, CVE-2018-16276, CVE-2018-18386, CVE-2018-18690, CVE-2018-18710
SHA-256 | 8af550c56d88e940bd49fc37b8e96986f53f118dc0a33f1ef43ae042d260ae9f
Ubuntu Security Notice USN-3849-2
Posted Dec 21, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3849-2 - USN-3849-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 14.04 LTS for Ubuntu 12.04 ESM. It was discovered that a NULL pointer dereference existed in the keyring subsystem of the Linux kernel. A local attacker could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local, vulnerability
systems | linux, ubuntu
advisories | CVE-2017-2647, CVE-2018-10902, CVE-2018-12896, CVE-2018-14734, CVE-2018-16276, CVE-2018-18386, CVE-2018-18690, CVE-2018-18710
SHA-256 | bdd2087e5d8c2e6ea3ea9fbd008a48c85005b8014c5200920d37f2ee93426078
Ubuntu Security Notice USN-3847-3
Posted Dec 21, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3847-3 - USN-3847-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04 LTS. This update provides the corresponding updates for the Linux kernel for Microsoft Azure Cloud systems for Ubuntu 14.04 LTS. It was discovered that a race condition existed in the raw MIDI driver for the Linux kernel, leading to a double free vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local, vulnerability
systems | linux, ubuntu
advisories | CVE-2018-10902, CVE-2018-12896, CVE-2018-14734, CVE-2018-16276, CVE-2018-18445, CVE-2018-18690, CVE-2018-18710
SHA-256 | 88ddcb277ba792306a56a051e1a6ea3b2df9a11ba6f4d4f0bb790bd6664c4b64
Ubuntu Security Notice USN-3848-2
Posted Dec 21, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3848-2 - USN-3848-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 16.04 LTS for Ubuntu 14.04 LTS. It was discovered that a double free existed in the AMD GPIO driver in the Linux kernel. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local, vulnerability
systems | linux, ubuntu
advisories | CVE-2017-18174, CVE-2018-12896, CVE-2018-18690, CVE-2018-18710
SHA-256 | 0e01790258c142284e2a185f6b24d6e1b1322200ec802bdf3976255b1f7553f0
Ubuntu Security Notice USN-3848-1
Posted Dec 21, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3848-1 - It was discovered that a double free existed in the AMD GPIO driver in the Linux kernel. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. 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. Kanda Motohiro discovered that writing extended attributes to an XFS file system in the Linux kernel in certain situations could cause an error condition to occur. A local attacker could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, overflow, arbitrary, kernel, local
systems | linux, osx, ubuntu
advisories | CVE-2017-18174, CVE-2018-12896, CVE-2018-18690, CVE-2018-18710
SHA-256 | ef32f46b101a860f44706fee0448815aa83426a298a340332abb7bab4d753836
Ubuntu Security Notice USN-3847-2
Posted Dec 20, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3847-2 - USN-3847-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 18.04 LTS for Ubuntu 16.04 LTS. It was discovered that a race condition existed in the raw MIDI driver for the Linux kernel, leading to a double free vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local, vulnerability
systems | linux, ubuntu
advisories | CVE-2018-10902, CVE-2018-12896, CVE-2018-14734, CVE-2018-16276, CVE-2018-18445, CVE-2018-18690, CVE-2018-18710
SHA-256 | f686a26622bf753cbbb760351f7a2649c795917011883eab629db03a6b1b546f
Ubuntu Security Notice USN-3847-1
Posted Dec 20, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3847-1 - It was discovered that a race condition existed in the raw MIDI driver for the Linux kernel, leading to a double free vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. 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. Various other issues were also addressed.

tags | advisory, denial of service, overflow, arbitrary, kernel, local
systems | linux, osx, ubuntu
advisories | CVE-2018-10902, CVE-2018-12896, CVE-2018-14734, CVE-2018-16276, CVE-2018-18445, CVE-2018-18690, CVE-2018-18710
SHA-256 | ab186e3e3caa72822140697919f42bea4149fc7ebd5e687a8c7c58306f58d45e
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