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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities
NOTICE UPDATE

NIST has updated the NVD program announcement page with additional information regarding recent concerns and the temporary delays in enrichment efforts.

CVE-2018-12896 Detail

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.


Severity

 


CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  5.5 MEDIUM
Vector:  CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://bugzilla.kernel.org/show_bug.cgi?id=200189 Issue Tracking  Vendor Advisory 
https://github.com/lcytxw/bug_repro/tree/master/bug_200189 Exploit  Third Party Advisory 
https://github.com/torvalds/linux/commit/78c9c4dfbf8c04883941445a195276bb4bb92c76 Patch  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 
https://usn.ubuntu.com/3847-1/ Third Party Advisory 
https://usn.ubuntu.com/3847-2/ Third Party Advisory 
https://usn.ubuntu.com/3847-3/ Third Party Advisory 
https://usn.ubuntu.com/3848-1/ Third Party Advisory 
https://usn.ubuntu.com/3848-2/ Third Party Advisory 
https://usn.ubuntu.com/3849-1/ Third Party Advisory 
https://usn.ubuntu.com/3849-2/ Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-190 Integer Overflow or Wraparound cwe source acceptance level NIST  

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Change History

7 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2018-12896
NVD Published Date:
07/02/2018
NVD Last Modified:
04/03/2019
Source:
MITRE