A flaw was found in X.Org Server before xorg-x11-server 1.20.9. An Out-Of-Bounds access in XkbSetNames function may lead to a privilege escalation vulnerability. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
| Link | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1862241 | issue tracking third party advisory |
| https://lists.x.org/archives/xorg-announce/2020-August/003058.html | vendor advisory |
| https://usn.ubuntu.com/4490-1/ | third party advisory vendor advisory |
| https://usn.ubuntu.com/4488-2/ | third party advisory vendor advisory |
| https://security.gentoo.org/glsa/202012-01 | third party advisory vendor advisory |
| https://www.zerodayinitiative.com/advisories/ZDI-20-1416/ | vdb entry third party advisory |
| http://www.openwall.com/lists/oss-security/2021/01/15/1 | third party advisory mailing list |