Vigil@nce - FFmpeg: out-of-bounds memory reading via block_cmp
September 2020 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/computer-vulne...
SYNTHESIS OF THE VULNERABILITY
Impacted products: Ubuntu.
Consequences: data reading, denial of service on service, denial of service on client.
Confidence: confirmed by the editor (5/5).
Creation date: 23/07/2020.
DESCRIPTION OF THE VULNERABILITY
An attacker can force a read at an invalid address via block_cmp() of FFmpeg, in order to trigger a denial of service, or to obtain sensitive information.
ACCESS TO THE FULL VIGIL@NCE BULLETIN