Public exploit available
Public proof-of-concept or exploit code exists (ExploitDB / Metasploit / Nuclei).
CVE-2017-18344
Severity
5.5MEDIUM
EPSS
11.9%
top 6.26%
CISA KEV
Not in KEV
Exploit
PoC available
Public exploit / PoC exists
Timeline
PublishedJul 26
Latest updateMay 13
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).
CVSS vector
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:NExploitability: 1.8 | Impact: 3.6
Affected Packages6 packages
Also affects: Ubuntu Linux 12.04, 14.04, Enterprise Linux 7.2, 7.3, 7.4, 7.5
Patches
🔴Vulnerability Details
3GHSA
▶
CVEList
▶
💥Exploits & PoCs
1Exploit-DB▶
Linux Kernel 4.14.7 (Ubuntu 16.04 / CentOS 7) - (KASLR & SMEP Bypass) Arbitrary File Read↗2018-08-09
📋Vendor Advisories
4Red Hat
▶
Debian▶
CVE-2017-18344: linux - The timer_create syscall implementation in kernel/time/posix-timers.c in the Lin...↗2017