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SYNTHESIS OF THE VULNERABILITY

An attacker an use an IPv6 packet with an Hop-by-Hop header in
order to stop the kernel.

Severity: 2/4

Consequences: denial of service of computer

Provenance: internet server

Means of attack: no proof of concept, no attack

Ability of attacker: expert (4/4)

Confidence: confirmed by the editor (5/5)

Diffusion of the vulnerable configuration: high (3/3)

Creation date: 14/01/2010

IMPACTED PRODUCTS

- Linux kernel

DESCRIPTION OF THE VULNERABILITY

An IPv6 packet can contain a Hop-by-hop header which indicates
options for each router on the path.

The ipv6_hop_jumbo() function of the net/ipv6/exthdrs.c file does
not check if the macro skb_dst() is null. A NULL pointer is then
dereferenced, which stops the kernel.

A remote attacker can therefore create a denial of service on
computers where IPv6 is enabled.

CHARACTERISTICS

Identifiers: BID-37810, CVE-2010-0006, VIGILANCE-VUL-9351

http://vigilance.fr/vulnerability/Linux-kernel-denial-of-service-via-ipv6-hop-jumbo-9351