The ACPI subsystem in the Linux kernel before 2.6.36.2 uses 0222 permissions for the debugfs custom_method file, which allows local users to gain privileges by placing a custom ACPI method in the ACPI interpreter tables, related to the acpi_debugfs_init function in drivers/acpi/debugfs.c.
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
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Linux_kernel | Linux | * | 2.6.36.2 (excluding) |
| MRG for RHEL-5 | RedHat | kernel-rt-0:2.6.33.7-rt29.55.el5rt | * |
| Linux | Ubuntu | upstream | * |
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://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=ed3aada1bf34c5a9e98af167f125f8a740fc726a
- http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00000.html
- http://lists.opensuse.org/opensuse-security-announce/2011-02/msg00000.html
- http://openwall.com/lists/oss-security/2010/12/15/3
- http://openwall.com/lists/oss-security/2010/12/15/7
- http://secunia.com/advisories/42778
- http://www.exploit-db.com/exploits/15774/
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.36.2
- http://www.securityfocus.com/bid/45408
- http://www.vupen.com/english/advisories/2011/0012
- http://www.vupen.com/english/advisories/2011/0298
- https://bugzilla.redhat.com/show_bug.cgi?id=663542
- https://exchange.xforce.ibmcloud.com/vulnerabilities/64155
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=ed3aada1bf34c5a9e98af167f125f8a740fc726a
- http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00000.html
- http://lists.opensuse.org/opensuse-security-announce/2011-02/msg00000.html
- http://openwall.com/lists/oss-security/2010/12/15/3
- http://openwall.com/lists/oss-security/2010/12/15/7
- http://secunia.com/advisories/42778
- http://www.exploit-db.com/exploits/15774/
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.36.2
- http://www.securityfocus.com/bid/45408
- http://www.vupen.com/english/advisories/2011/0012
- http://www.vupen.com/english/advisories/2011/0298
- https://bugzilla.redhat.com/show_bug.cgi?id=663542
- https://exchange.xforce.ibmcloud.com/vulnerabilities/64155