CVE-2010-4258

The do_exit function in kernel/exit.c in the Linux kernel before 2.6.36.2 does not properly handle a KERNEL_DS get_fs value, which allows local users to bypass intended access_ok restrictions, overwrite arbitrary kernel memory locations, and gain privileges by leveraging a (1) BUG, (2) NULL pointer dereference, or (3) page fault, as demonstrated by vectors involving the clear_child_tid feature and the splice system call.

Weakness

The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.

Affected Software

Potential Mitigations

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/122.html
• https://cwe.mitre.org/data/definitions/233.html
• https://cwe.mitre.org/data/definitions/58.html

References

• http://archives.neohapsis.com/archives/fulldisclosure/2010-12/0086.html
• http://blog.nelhage.com/2010/12/cve-2010-4258-from-dos-to-privesc/
• http://code.google.com/p/chromium-os/issues/detail?id=10234
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=33dd94ae1ccbfb7bf0fb6c692bc3d1c4269e6177
• http://googlechromereleases.blogspot.com/2011/01/chrome-os-beta-channel-update.html
• http://lists.fedoraproject.org/pipermail/package-announce/2010-December/052513.html
• http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00000.html
• http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00001.html
• http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00004.html
• http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00007.html
• http://lists.opensuse.org/opensuse-security-announce/2011-02/msg00000.html
• http://lists.opensuse.org/opensuse-security-announce/2011-02/msg00002.html
• http://marc.info/?l=linux-kernel\u0026m=129117048916957\u0026w=2
• http://openwall.com/lists/oss-security/2010/12/02/2
• http://openwall.com/lists/oss-security/2010/12/02/3
• http://openwall.com/lists/oss-security/2010/12/02/4
• http://openwall.com/lists/oss-security/2010/12/02/7
• http://openwall.com/lists/oss-security/2010/12/08/4
• http://openwall.com/lists/oss-security/2010/12/08/5
• http://openwall.com/lists/oss-security/2010/12/08/9
• http://openwall.com/lists/oss-security/2010/12/09/14
• http://openwall.com/lists/oss-security/2010/12/09/4
• http://secunia.com/advisories/42745
• http://secunia.com/advisories/42778
• http://secunia.com/advisories/42801
• http://secunia.com/advisories/42932
• http://secunia.com/advisories/43056
• http://secunia.com/advisories/43291
• http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.36.2
• http://www.mandriva.com/security/advisories?name=MDVSA-2011:029
• http://www.vupen.com/english/advisories/2010/3321
• http://www.vupen.com/english/advisories/2011/0012
• http://www.vupen.com/english/advisories/2011/0124
• http://www.vupen.com/english/advisories/2011/0213
• http://www.vupen.com/english/advisories/2011/0298
• http://www.vupen.com/english/advisories/2011/0375
• https://bugzilla.redhat.com/show_bug.cgi?id=659567
• https://lkml.org/lkml/2010/12/1/543