fs/jfs/xattr.c in the Linux kernel before 2.6.35.2 does not properly...

Vulnerability Description

fs/jfs/xattr.c in the Linux kernel before 2.6.35.2 does not properly handle a certain legacy format for storage of extended attributes, which might allow local users by bypass intended xattr namespace restrictions via an "os2." substring at the beginning of a name.

References

• http://www.ubuntu.com/usn/USN-1000-1
• http://www.openwall.com/lists/oss-security/2010/08/20/11
• http://lists.opensuse.org/opensuse-security-announce/2010-09/msg00004.html
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=aca0fa34bdaba39bfddddba8ca70dba4782e8fe6
• http://lists.opensuse.org/opensuse-security-announce/2011-02/msg00000.html
• http://lists.opensuse.org/opensuse-security-announce/2010-12/msg00004.html
• http://www.vupen.com/english/advisories/2011/0298
• http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.27.51
• http://www.mandriva.com/security/advisories?name=MDVSA-2011:051
• http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.35.2
• http://www.securityfocus.com/bid/42589
• http://www.vupen.com/english/advisories/2011/0375
• http://www.openwall.com/lists/oss-security/2010/08/20/1
• http://lists.opensuse.org/opensuse-security-announce/2011-02/msg00002.html
• http://www.kernel.org/pub/linux/kernel/v2.4/ChangeLog-2.4.37.10
• http://secunia.com/advisories/43291
• http://secunia.com/advisories/41321
• http://lists.opensuse.org/opensuse-security-announce/2010-11/msg00000.html