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Vigil@nce - Linux kernel: denial of service via SCTP sk_ack_backlog
July 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 SCTP packets to the Linux kernel,
in order to trigger a denial of service.
Impacted products: Fedora, Linux
Severity: 2/4
Creation date: 27/06/2014
DESCRIPTION OF THE VULNERABILITY
The SCTP protocol is used to transport several message streams,
multiplexed over one connection.
However, when the kernel receives a malformed SCTP COOKIE_ECHO
packet, the sk_ack_backlog value is decremented below zero, which
then triggers a fatal error.
An attacker can therefore send a malicious SCTP packets to the
Linux kernel, in order to trigger a denial of service.
ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN
http://vigilance.fr/vulnerability/Linux-kernel-denial-of-service-via-SCTP-sk-ack-backlog-14949
