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.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published: 2018-07-27T18:00:00

Updated: 2024-08-05T14:02:06.893Z

Reserved: 2016-12-01T00:00:00

Link: CVE-2017-2624

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2018-07-27T18:29:00.827

Modified: 2024-11-21T03:23:51.390

Link: CVE-2017-2624

cve-icon Redhat

Severity : Low

Publid Date: 2017-02-28T00:00:00Z

Links: CVE-2017-2624 - Bugzilla