Vigil@nce - OpenBSD ssh-keygen: NULL pointer dereference via a FIDO token
June 2020 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/?langue=2
SYNTHESIS OF THE VULNERABILITY
Impacted products: OpenBSD.
Consequences: denial of service on server, denial of service on service, denial of service on client.
Provenance: physical access.
Confidence: confirmed by the editor (5/5).
Creation date: 19/05/2020.
DESCRIPTION OF THE VULNERABILITY
An attacker can force a NULL pointer to be dereferenced when using a FIDO token with OpenBSD ssh-keygen, in order to trigger a denial of service.
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