Vigil@nce - OpenBSD: denial of service via PIPEX
December 2014 by Vigil@nce
This bulletin was written by Vigil@nce : http://vigilance.fr/offer
SYNTHESIS OF THE VULNERABILITY
An attacker can send a malicious PIPEX packet to OpenBSD, in order to trigger a denial of service.
Impacted products: OpenBSD
Creation date: 05/12/2014
DESCRIPTION OF THE VULNERABILITY
The OpenBSD product implements the PIPEX (PPP IP EXtension) extension, which is enabled with net.pipex.enable.
However, when a malicious packet is received, a fatal error occurs in pipex_common_input(), pipex_pptp_lookup_session() or pipex_mppe_input().
An attacker can therefore send a malicious PIPEX packet to OpenBSD, in order to trigger a denial of service.
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