CVE-2018-12896

CVSS V2 Low 2.1 CVSS V3 Medium 5.5
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.
Overview
  • CVE ID
  • CVE-2018-12896
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2018-07-02T17:29:00
  • Last Modified Date
  • 2019-04-03T12:04:40
Weakness Enumerations
CWE URL
CWE-190 http://cwe.mitre.org/data/definitions/190.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 1 OR 4.17.3
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:* 1 OR
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* 1 OR
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* 1 OR
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:L/AC:L/Au:N/C:N/I:N/A:P
  • Access Vector
  • LOCAL
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • NONE
  • Availability Impact
  • PARTIAL
  • Base Score
  • 2.1
  • Severity
  • LOW
  • Exploitability Score
  • 3.9
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.0
  • Vector String
  • CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  • Attack Vector
  • LOCAL
  • Attack Compatibility
  • LOW
  • Privileges Required
  • LOW
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • HIGH
  • Base Score
  • 5.5
  • Base Severity
  • MEDIUM
  • Exploitability Score
  • 1.8
  • Impact Score
  • 3.6
References
Reference URL Reference Tags
https://github.com/torvalds/linux/commit/78c9c4dfbf8c04883941445a195276bb4bb92c76 Patch Third Party Advisory
https://github.com/lcytxw/bug_repro/tree/master/bug_200189 Exploit Third Party Advisory
https://bugzilla.kernel.org/show_bug.cgi?id=200189 Issue Tracking Vendor Advisory
https://usn.ubuntu.com/3849-2/ Third Party Advisory
https://usn.ubuntu.com/3848-2/ Third Party Advisory
https://usn.ubuntu.com/3848-1/ Third Party Advisory
https://usn.ubuntu.com/3847-3/ Third Party Advisory
https://usn.ubuntu.com/3847-2/ Third Party Advisory
https://usn.ubuntu.com/3847-1/ Third Party Advisory
https://usn.ubuntu.com/3849-1/ Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/03/msg00017.html Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html Mailing List Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2018-12896
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12896
History
Created Old Value New Value Data Type Notes
2022-05-10 17:44:40 Added to TrackCVE
2022-12-03 08:52:16 2018-07-02T17:29Z 2018-07-02T17:29:00 CVE Published Date updated
2022-12-03 08:52:16 2019-04-03T12:04:40 CVE Modified Date updated
2022-12-03 08:52:16 Analyzed Vulnerability Status updated