Vigil@nce - SHA1: information disclosure via Chosen-Prefix Collision
January 2020 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/offer/Computer...
SYNTHESIS OF THE VULNERABILITY
Impacted products: GnuPG, Ubuntu.
Consequences: data reading, data creation/edition.
Confidence: confirmed by the editor (5/5).
Creation date: 09/01/2020.
DESCRIPTION OF THE VULNERABILITY
An attacker can trigger a Chosen-Prefix Collision on SHA1, in order to alter a signature, to obtain sensitive information.
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