Vigil@nce - UPX: use after free via PackLinuxElf64-unpack
April 2020 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/?langue=2
SYNTHESIS OF THE VULNERABILITY
Impacted products: Fedora, openSUSE Leap, SLES.
Consequences: user access/rights, denial of service on service, denial of service on client.
Confidence: confirmed by the editor (5/5).
Creation date: 03/02/2020.
DESCRIPTION OF THE VULNERABILITY
An attacker can force the usage of a freed memory area via PackLinuxElf64::unpack() of UPX, in order to trigger a denial of service, and possibly to run code.
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