CVE-2017-18344
MEDIUMLinux Kernel < 4.14.8 - Out-of-bounds Read via timer_create sigev_notify Field
Title source: llmExploitation Summary
EIP tracks 1 public exploit for CVE-2017-18344. PoCs published by Andrey Konovalov.
AI-analyzed exploit summary This exploit leverages CVE-2017-18344 to bypass KASLR and SMEP, allowing arbitrary kernel memory reads. It demonstrates searching for and dumping sensitive data (e.g., /etc/shadow) by mapping physical memory.
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).
Exploits (1)
This exploit leverages CVE-2017-18344 to bypass KASLR and SMEP, allowing arbitrary kernel memory reads. It demonstrates searching for and dumping sensitive data (e.g., /etc/shadow) by mapping physical memory.
References (15)
Scores
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N