Fixed
Created: Jul 31, 2018
Updated: Oct 26, 2018
Resolved Date: Aug 14, 2018
Found In Version: 7.0
Fix Version: 7.0.0.29
Severity: Standard
Applicable for: Wind River Linux 7
Component/s: Userspace
It was found that xorg-x11-server before 1.19.0 including uses memcmp() to check the received MIT cookie against a series of valid cookies. If the cookie is correct, it is allowed to attach to the Xorg session. Since most memcmp() implementations return after an invalid byte is seen, this causes a time difference between a valid and invalid byte, which could allow an efficient brute force attack.
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-2624
