The compat_alloc_user_space functions in include/asm/compat.h files in the Linux kernel...
Vulnerability 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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
- http://www.vmware.com/security/advisories/VMSA-2010-0017.html
- http://isc.sans.edu/diary.html?storyid=9574
- http://www.vupen.com/english/advisories/2010/3083
- http://www.vupen.com/english/advisories/2010/3117
- http://sota.gen.nz/compat1/
- http://www.mandriva.com/security/advisories?name=MDVSA-2010:198
- https://access.redhat.com/kb/docs/DOC-40265
- http://www.securityfocus.com/archive/1/514938/30/30/threaded
- http://secunia.com/advisories/42384
- http://archives.neohapsis.com/archives/fulldisclosure/2010-09/0278.html
- http://lists.opensuse.org/opensuse-security-announce/2011-02/msg00000.html
- http://www.redhat.com/support/errata/RHSA-2010-0842.html
- http://www.mandriva.com/security/advisories?name=MDVSA-2010:247
- http://www.vupen.com/english/advisories/2011/0298
- http://www.redhat.com/support/errata/RHSA-2010-0882.html
- http://www.kernel.org/pub/linux/kernel/v2.6/snapshots/patch-2.6.36-rc4-git2.log
- http://lists.opensuse.org/opensuse-security-announce/2010-10/msg00003.html
- http://blog.ksplice.com/2010/09/cve-2010-3081/
- http://secunia.com/advisories/43315
- http://lists.opensuse.org/opensuse-security-announce/2010-09/msg00006.html
- http://www.vmware.com/security/advisories/VMSA-2011-0003.html
- http://archives.neohapsis.com/archives/fulldisclosure/2010-09/0273.html
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=c41d68a513c71e35a14f66d71782d27a79a81ea6
- http://www.redhat.com/support/errata/RHSA-2010-0758.html
- http://www.securityfocus.com/archive/1/516397/100/0/threaded
- https://bugzilla.redhat.com/show_bug.cgi?id=634457
- http://www.mandriva.com/security/advisories?name=MDVSA-2010:214
- http://marc.info/?l=oss-security&m=128461522230211&w=2
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