Multiple integer overflows in the (1) pppol2tp_sendmsg function in net/l2tp/l2tp_ppp.c, and the (2) l2tp_ip_sendmsg function in net/l2tp/l2tp_ip.c, in the PPPoL2TP and IPoL2TP implementations in the Linux kernel before 2.6.36.2 allow local users to cause a denial of service (heap memory corruption and panic) or possibly gain privileges via a crafted sendto call.

References

• https://nvd.nist.gov/vuln/detail/CVE-2010-4160
• https://bugzilla.redhat.com/show_bug.cgi?id=651892
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=253eacc070b114c2ec1f81b067d2fed7305467b0
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=8acfe468b0384e834a303f08ebc4953d72fb690a
• http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00001.html
• http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00004.html
• http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00007.html
• http://lists.opensuse.org/opensuse-security-announce/2011-02/msg00002.html
• http://openwall.com/lists/oss-security/2010/11/10/16
• http://openwall.com/lists/oss-security/2010/11/10/5
• http://openwall.com/lists/oss-security/2010/11/24/12
• http://openwall.com/lists/oss-security/2010/11/24/4
• http://openwall.com/lists/oss-security/2010/11/24/5
• http://openwall.com/lists/oss-security/2010/11/24/6
• http://secunia.com/advisories/42801
• http://secunia.com/advisories/42890
• http://secunia.com/advisories/42932
• http://secunia.com/advisories/43056
• http://secunia.com/advisories/43291
• http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.36.2
• http://www.redhat.com/support/errata/RHSA-2011-0007.html
• http://www.securityfocus.com/bid/44762
• http://www.spinics.net/lists/netdev/msg145248.html
• http://www.spinics.net/lists/netdev/msg145673.html
• http://www.vupen.com/english/advisories/2011/0012
• http://www.vupen.com/english/advisories/2011/0124
• http://www.vupen.com/english/advisories/2011/0213
• http://www.vupen.com/english/advisories/2011/0375
• http://xorl.wordpress.com/2010/11/11/cve-2010-4160-linux-kernel-l2tp-integer-overflows/
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=253eacc070b114c2ec1f81b067d2fed7305467b0
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=8acfe468b0384e834a303f08ebc4953d72fb690a