CVE-2010-3081

Description

The compat_alloc_user_space functions in include/asm/compat.h files in the Linux kernel before 2.6.36-rc4-git2 on 64-bit platforms do not properly allocate the userspace memory required for the 32-bit compatibility layer, which allows local users to gain privileges by leveraging the ability of the compat_mc_getsockopt function (aka the MCAST_MSFILTER getsockopt support) to control a certain length value, related to a "stack pointer underflow" issue, as exploited in the wild in September 2010.

References

http://archives.neohapsis.com/archives/fulldisclosure/2010-09/0273.html

http://archives.neohapsis.com/archives/fulldisclosure/2010-09/0278.html

http://blog.ksplice.com/2010/09/cve-2010-3081/

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=c41d68a513c71e35a14f66d71782d27a79a81ea6

http://isc.sans.edu/diary.html?storyid=9574

http://lists.opensuse.org/opensuse-security-announce/2010-09/msg00006.html

http://lists.opensuse.org/opensuse-security-announce/2010-10/msg00003.html

http://lists.opensuse.org/opensuse-security-announce/2011-02/msg00000.html

http://marc.info/?l=oss-security&m=128461522230211&w=2

http://secunia.com/advisories/42384

http://secunia.com/advisories/43315

http://sota.gen.nz/compat1/

http://www.kernel.org/pub/linux/kernel/v2.6/snapshots/patch-2.6.36-rc4-git2.log

http://www.mandriva.com/security/advisories?name=MDVSA-2010:198

http://www.mandriva.com/security/advisories?name=MDVSA-2010:214

http://www.mandriva.com/security/advisories?name=MDVSA-2010:247

http://www.redhat.com/support/errata/RHSA-2010-0758.html

http://www.redhat.com/support/errata/RHSA-2010-0842.html

http://www.redhat.com/support/errata/RHSA-2010-0882.html

http://www.securityfocus.com/archive/1/514938/30/30/threaded

http://www.securityfocus.com/archive/1/516397/100/0/threaded

http://www.vmware.com/security/advisories/VMSA-2010-0017.html

http://www.vmware.com/security/advisories/VMSA-2011-0003.html

http://www.vupen.com/english/advisories/2010/3083

http://www.vupen.com/english/advisories/2010/3117

http://www.vupen.com/english/advisories/2011/0298

https://access.redhat.com/kb/docs/DOC-40265

https://bugzilla.redhat.com/show_bug.cgi?id=634457

Details

Risk Information

CVSS v2.0