Vigil@nce - LibGD: use after free via gdImagePtr
April 2019 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/offer/Computer-vulnerability-database-and-alert
SYNTHESIS OF THE VULNERABILITY
Impacted products: Debian, openSUSE Leap, SUSE Linux Enterprise
Desktop, SLES, Ubuntu.
Severity: 2/4.
Consequences: user access/rights, denial of service on service,
denial of service on client.
Provenance: document.
Confidence: confirmed by the editor (5/5).
Creation date: 31/01/2019.
DESCRIPTION OF THE VULNERABILITY
An attacker can force the usage of a freed memory area via
gdImagePtr() of LibGD, in order to trigger a denial of service,
and possibly to run code.
ACCESS TO THE FULL VIGIL@NCE BULLETIN
https://vigilance.fr/vulnerability/LibGD-use-after-free-via-gdImagePtr-28413