A flaw was found in the way xserver memory was not properly initialized. This could leak parts of server memory to the X client. In cases where Xorg server runs with elevated privileges, this could result in possible ASLR bypass. Xorg-server before version 1.20.9 is vulnerable.
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14347
https://www.openwall.com/lists/oss-security/2020/07/31/2
https://lists.x.org/archives/xorg-announce/2020-July/003051.html
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00066.html
https://lists.debian.org/debian-lts-announce/2020/08/msg00057.html
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00075.html
https://www.debian.org/security/2020/dsa-4758
https://usn.ubuntu.com/4488-1/
Source: MITRE
Published: 2020-08-05
Updated: 2023-02-03
Type: CWE-665
Base Score: 2.1
Vector: AV:L/AC:L/Au:N/C:P/I:N/A:N
Impact Score: 2.9
Exploitability Score: 3.9
Severity: LOW
Base Score: 5.5
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Impact Score: 3.6
Exploitability Score: 1.8
Severity: MEDIUM