Vigil@nce - libX11: use after free via Locale
October 2020 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/offer/Computer-vulnerabilities-watch-and-alert
SYNTHESIS OF THE VULNERABILITY
Impacted products: Debian, Fedora, OpenBSD, openSUSE Leap, SUSE
Linux Enterprise Desktop, SLES, Ubuntu, libX11.
Severity: 2/4.
Consequences: user access/rights, denial of service on service,
denial of service on client.
Provenance: user shell.
Confidence: confirmed by the editor (5/5).
Creation date: 25/08/2020.
DESCRIPTION OF THE VULNERABILITY
An attacker can force the usage of a freed memory area via Locale
of libX11, in order to trigger a denial of service, and possibly
to run code.
ACCESS TO THE FULL VIGIL@NCE BULLETIN
https://vigilance.fr/vulnerability/libX11-use-after-free-via-Locale-33144