LookupCol.c in X.Org X through X11R7.7 and libX11 before 1.7.1 might allow remote attackers to execute arbitrary code. The libX11 XLookupColor request (intended for server-side color lookup) contains a flaw allowing a client to send color-name requests with a name longer than the maximum size allowed by the protocol (and also longer than the maximum packet size for normal-sized packets). The user-controlled data exceeding the maximum size is then interpreted by the server as additional X protocol requests and executed, e.g., to disable X server authorization completely. For example, if the victim encounters malicious terminal control sequences for color codes, then the attacker may be able to take full control of the running graphical session.
References
Link Resource
http://packetstormsecurity.com/files/162737/libX11-Insufficient-Length-Check-Injection.html Exploit Third Party Advisory VDB Entry
http://seclists.org/fulldisclosure/2021/May/52 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/05/18/2 Mailing List Third Party Advisory
https://gitlab.freedesktop.org/xorg/lib/libx11/-/commit/8d2e02ae650f00c4a53deb625211a0527126c605 Third Party Advisory
https://lists.apache.org/thread.html/r61db8e7dcb56dc000a5387a88f7a473bacec5ee01b9ff3f55308aacc%40%3Cdev.kafka.apache.org%3E
https://lists.apache.org/thread.html/r61db8e7dcb56dc000a5387a88f7a473bacec5ee01b9ff3f55308aacc%40%3Cusers.kafka.apache.org%3E
https://lists.apache.org/thread.html/rbf4ce74b0d1fa9810dec50ba3ace0caeea677af7c27a97111c06ccb7%40%3Cdev.kafka.apache.org%3E
https://lists.apache.org/thread.html/rbf4ce74b0d1fa9810dec50ba3ace0caeea677af7c27a97111c06ccb7%40%3Cusers.kafka.apache.org%3E
https://lists.debian.org/debian-lts-announce/2021/05/msg00021.html Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TEOT4RLB76RVPJQKGGTIKTBIOLHX2NR6/
https://lists.freedesktop.org/archives/xorg/ Third Party Advisory
https://lists.x.org/archives/xorg-announce/2021-May/003088.html Vendor Advisory
https://security.gentoo.org/glsa/202105-16 Third Party Advisory
https://security.netapp.com/advisory/ntap-20210813-0001/ Third Party Advisory
https://unparalleled.eu/blog/2021/20210518-using-xterm-to-navigate-the-huge-color-space/ Exploit Third Party Advisory
https://unparalleled.eu/publications/2021/advisory-unpar-2021-1.txt Exploit Third Party Advisory
https://www.debian.org/security/2021/dsa-4920 Third Party Advisory
https://www.openwall.com/lists/oss-security/2021/05/18/2 Mailing List Third Party Advisory
https://www.openwall.com/lists/oss-security/2021/05/18/3 Mailing List Third Party Advisory
History

No history.

cve-icon MITRE Information

Status: PUBLISHED

Assigner: mitre

Published: 2021-05-27T12:26:26

Updated: 2021-09-02T03:07:21

Reserved: 2021-04-21T00:00:00


Link: CVE-2021-31535

JSON object: View

cve-icon NVD Information

Status : Modified

Published: 2021-05-27T13:15:08.240

Modified: 2023-11-07T03:34:58.383


Link: CVE-2021-31535

JSON object: View

cve-icon Redhat Information

No data.

CWE