CVE-2010-3081 Information

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.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Reference

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

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8