The udp_sendmsg function in the UDP implementation in (1) net/ipv4/udp.c and (2) net/ipv6/udp.c in the Linux kernel before 2.6.19 allows local users to gain privileges or cause a denial of service (NULL pointer dereference and system crash) via vectors involving the MSG_MORE flag and a UDP socket.

References

• https://nvd.nist.gov/vuln/detail/CVE-2009-2698
• https://bugzilla.redhat.com/show_bug.cgi?id=518034
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11514
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8557
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9142
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=1e0c14f49d6b393179f423abbac47f85618d3d46
• http://lists.opensuse.org/opensuse-security-announce/2009-08/msg00008.html
• http://rhn.redhat.com/errata/RHSA-2009-1222.html
• http://rhn.redhat.com/errata/RHSA-2009-1223.html
• http://secunia.com/advisories/23073
• http://secunia.com/advisories/36430
• http://secunia.com/advisories/36510
• http://secunia.com/advisories/37105
• http://secunia.com/advisories/37298
• http://secunia.com/advisories/37471
• http://support.avaya.com/css/P8/documents/100067254
• http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.19
• http://www.mandriva.com/security/advisories?name=MDVSA-2011:051
• http://www.openwall.com/lists/oss-security/2009/08/25/1
• http://www.redhat.com/support/errata/RHSA-2009-1233.html
• http://www.securityfocus.com/archive/1/507985/100/0/threaded
• http://www.securityfocus.com/archive/1/512019/100/0/threaded
• http://www.securityfocus.com/bid/36108
• http://www.securitytracker.com/id?1022761
• http://www.ubuntu.com/usn/USN-852-1
• http://www.vmware.com/security/advisories/VMSA-2009-0016.html
• http://www.vupen.com/english/advisories/2009/3316
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=1e0c14f49d6b393179f423abbac47f85618d3d46