News
Vigil@nce: Linux kernel, denial of service via SIT
May 2008 by Vigil@nce
An attacker can use IPv6 packets in a SIT tunnel in order to
progressively create a denial of service.
– Gravity: 2/4
– CVSS: 7.8/10
– Consequences: denial of service of computer
– Provenance: internet client
– 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: 15/05/2008
– Identifier: VIGILANCE-VUL-7831
AFFECTED PRODUCTS
– Fedora version 8 [with kernel < 2.6.24.7-92.fc8]
– Fedora version 9 [with kernel < 2.6.25.3-18.fc9]
– Linux kernel versions 2.6.0, 2.6.1, 2.6.2, 2.6.3, 2.6.4, 2.6.5,
2.6.6, 2.6.7, 2.6.8, 2.6.8.1, 2.6.9, 2.6.10, 2.6.11, 2.6.11.1,
2.6.11.2, 2.6.11.3, 2.6.11.4, 2.6.11.5, 2.6.11.6, 2.6.11.7,
2.6.11.8, 2.6.11.9, 2.6.11.10, 2.6.11.11, 2.6.11.12, 2.6.12,
2.6.12.1, 2.6.12.2, 2.6.12.3, 2.6.12.4, 2.6.12.5, 2.6.12.6,
2.6.13, 2.6.13.1, 2.6.13.2, 2.6.13.3, 2.6.13.4, 2.6.13.5, 2.6.14,
2.6.14.1, 2.6.14.2, 2.6.14.3, 2.6.14.4, 2.6.14.5, 2.6.14.6,
2.6.14.7, 2.6.15, 2.6.15.1, 2.6.15.2, 2.6.15.3, 2.6.15.4,
2.6.15.5, 2.6.15.6, 2.6.15.7, 2.6.16, 2.6.16.1, 2.6.16.2,
2.6.16.3, 2.6.16.4, 2.6.16.5, 2.6.16.6, 2.6.16.7, 2.6.16.8,
2.6.16.9, 2.6.16.10, 2.6.16.11, 2.6.16.12, 2.6.16.13, 2.6.16.14,
2.6.16.15, 2.6.16.16, 2.6.16.17, 2.6.16.18, 2.6.16.19, 2.6.16.20,
2.6.16.21, 2.6.16.22, 2.6.16.23, 2.6.16.24, 2.6.16.25, 2.6.16.26,
2.6.16.27, 2.6.16.28, 2.6.16.29, 2.6.16.30, 2.6.16.31, 2.6.16.32,
2.6.16.33, 2.6.16.34, 2.6.16.35, 2.6.16.36, 2.6.16.37, 2.6.16.38,
2.6.16.39, 2.6.16.40, 2.6.16.41, 2.6.16.42, 2.6.16.43, 2.6.16.44,
2.6.16.45, 2.6.16.46, 2.6.16.47, 2.6.16.48, 2.6.16.49, 2.6.16.50,
2.6.16.51, 2.6.16.52, 2.6.16.53, 2.6.16.54, 2.6.16.55, 2.6.16.56,
2.6.16.57, 2.6.16.58, 2.6.16.59, 2.6.16.60, 2.6.17, 2.6.17.1,
2.6.17.2, 2.6.17.3, 2.6.17.4, 2.6.17.5, 2.6.17.6, 2.6.17.7,
2.6.17.8, 2.6.17.9, 2.6.17.10, 2.6.17.11, 2.6.17.12, 2.6.17.13,
2.6.17.14, 2.6.18, 2.6.18.1, 2.6.18.2, 2.6.18.3, 2.6.18.4,
2.6.18.5, 2.6.18.6, 2.6.18.7, 2.6.18.8, 2.6.19, 2.6.19.1,
2.6.19.2, 2.6.19.3, 2.6.19.4, 2.6.19.5, 2.6.19.6, 2.6.19.7,
2.6.20, 2.6.20.1, 2.6.20.2, 2.6.20.3, 2.6.20.4, 2.6.20.5,
2.6.20.6, 2.6.20.7, 2.6.20.8, 2.6.20.9, 2.6.20.10, 2.6.20.11,
2.6.20.12, 2.6.20.13, 2.6.20.14, 2.6.20.15, 2.6.20.16, 2.6.20.17,
2.6.20.18, 2.6.20.19, 2.6.20.20, 2.6.20.21, 2.6.21, 2.6.21.1,
2.6.21.2, 2.6.21.3, 2.6.21.4, 2.6.21.5, 2.6.21.6, 2.6.21.7,
2.6.22, 2.6.22.1, 2.6.22.2, 2.6.22.3, 2.6.22.4, 2.6.22.5,
2.6.22.6, 2.6.22.7, 2.6.22.8, 2.6.22.9, 2.6.22.10, 2.6.22.11,
2.6.22.12, 2.6.22.13, 2.6.22.14, 2.6.22.15, 2.6.22.16, 2.6.22.17,
2.6.22.18, 2.6.22.19, 2.6.23, 2.6.23.1, 2.6.23.2, 2.6.23.3,
2.6.23.4, 2.6.23.5, 2.6.23.6, 2.6.23.7, 2.6.23.8, 2.6.23.9,
2.6.23.10, 2.6.23.11, 2.6.23.12, 2.6.23.13, 2.6.23.14, 2.6.23.15,
2.6.23.16, 2.6.23.17, 2.6.24, 2.6.24.1, 2.6.24.2, 2.6.24.3,
2.6.24.4, 2.6.24.5, 2.6.24.6, 2.6.24.7, 2.6.25, 2.6.25.1,
2.6.25.2, 2.6.25.3
Similar products or versions inferior to those indicated may also
be affected.
DESCRIPTION
The net/ipv6/sit.c file implements SIT (Simple Internet
Transition) and proposes tunnels to encapsulate IPv6 packets on an
IPv4 network. The administrator for example configure them with
"ifconfig sit0 ...".
The ipip6_rcv() function does not free a memory area when
pskb_may_pull() fails. This memory leak can be exploited by an
attacker sending IPv6 packets.
A remote attacker can thus progressively create a denial of
service on computers with SIT tunnels.
CHARACTERISTICS
– Identifiers: 446031, CVE-2008-2136, FEDORA-2008-3873,
FEDORA-2008-3949, VIGILANCE-VUL-7831
– CVSS score: 7.8/10
– Url: https://vigilance.aql.fr/tree/1/7831
