CVE-2017-18344

Description (CNA)

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).

Affected (CNA)

CWE

No CWE identifiers supplied.

References

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

ADP enrichment