CVE-2017-18344 Detail

Current Description

The timer_create syscall implementation in kernel/time/posix-timers.c in the Linux kernel before 4.14.8 doesn't properly validate the sigevent->sigev_notify field, which leads to out-of-bounds access in the show_timer function (called when /proc/$PID/timers is read). This allows userspace applications to read arbitrary kernel memory (on a kernel built with CONFIG_POSIX_TIMERS and CONFIG_CHECKPOINT_RESTORE).


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:H/I:N/A:N


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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
http://www.securityfocus.com/bid/104909 Third Party Advisory  VDB Entry 
http://www.securitytracker.com/id/1041414 Third Party Advisory  VDB Entry 
https://access.redhat.com/errata/RHSA-2018:2948 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2018:3083 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2018:3096 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2018:3459 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2018:3540 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2018:3586 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2018:3590 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2018:3591 Third Party Advisory 
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.8 Third Party Advisory 
https://github.com/torvalds/linux/commit/cef31d9af908243421258f1df35a4a644604efbe Patch  Third Party Advisory 
https://usn.ubuntu.com/3742-1/ Third Party Advisory 
https://usn.ubuntu.com/3742-2/ Third Party Advisory 
https://www.exploit-db.com/exploits/45175/ Exploit  Third Party Advisory  VDB Entry 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-125 Out-of-bounds Read cwe source acceptance level NIST  

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Change History

10 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2017-18344
NVD Published Date:
07/26/2018
NVD Last Modified:
10/15/2020
Source:
MITRE