CVE-2017-18344

 

Published at: - 26-07-2018 09:29

Last modified: - 26-10-2022 01:44

Total changes: - 3

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).

Common Vulnerability Scoring System (CVSS)

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

 

Verification logic

 

Reference

• https://github.com/torvalds/linux/commit/cef31d9af908243421258f1df35a4a644604efbe
• https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.8
• 104909-Third Party Advisory, VDB Entry
• 1041414-Third Party Advisory, VDB Entry
• 45175-Exploit, Third Party Advisory, VDB Entry
• USN-3742-2-Third Party Advisory
• USN-3742-1-Third Party Advisory
• RHSA-2018:3096-Third Party Advisory
• RHSA-2018:3083-Third Party Advisory
• RHSA-2018:2948-Third Party Advisory
• RHSA-2018:3459-Third Party Advisory
• RHSA-2018:3591-Third Party Advisory
• RHSA-2018:3590-Third Party Advisory
• RHSA-2018:3586-Third Party Advisory
• RHSA-2018:3540-Third Party Advisory

 

Keywords

NVD

 

CVE-2017-18344

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures