CVE-2018-12896 Detail

Current 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.


View Analysis Description

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

By selecting these links, you will be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to nvd@nist.gov.

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  

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Denotes Vulnerable Software
Are we missing a CPE here? Please let us know.

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