CVE-2018-18386 Information

Description

drivers/tty/n_tty.c in the Linux kernel before 4.14.11 allows local attackers (who are able to access pseudo terminals) to hang/block further usage of any pseudo terminal devices due to an EXTPROC versus ICANON confusion in TIOCINQ.

CVSS Vector

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

Reference

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=966031f340185eddd05affcf72b740549f056348 https://access.redhat.com/errata/RHSA-2019:0831 https://bugzilla.suse.com/show_bug.cgi?id=1094825 https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.11 https://github.com/torvalds/linux/commit/966031f340185eddd05affcf72b740549f056348 https://usn.ubuntu.com/3849-1/ https://usn.ubuntu.com/3849-2/

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

LOW

Base Severity

3.3