Vigil@nce - varnish-modules: NULL pointer dereference via header.append/copy
May 2021 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/computer-vulne...
SYNTHESIS OF THE VULNERABILITY
Impacted products: Varnish.
Consequences: denial of service on service, denial of service on client.
Provenance: internet client.
Confidence: confirmed by the editor (5/5).
Creation date: 16/03/2021.
DESCRIPTION OF THE VULNERABILITY
An attacker can force a NULL pointer to be dereferenced via header.append/copy() of varnish-modules, in order to trigger a denial of service.
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