Vulnerability CVE-2010-4347
Published: 2010-12-22   Modified: 2012-02-13

Description:
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.

See advisories in our WLB2 database:
Topic
Author
Date
Med.
Linux Kernel < 2.6.37-rc2 ACPI custom_method Privilege Escalation
Jon Oberheide
25.12.2010

Type:

CWE-264

 (Permissions, Privileges, and Access Controls)

CVSS2 => (AV:L/AC:M/Au:N/C:C/I:C/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
6.9/10
10/10
3.4/10
Exploit range
Attack complexity
Authentication
Local
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Complete
Complete
Complete
Affected software
Linux -> Kernel 

 References:
https://bugzilla.redhat.com/show_bug.cgi?id=663542
http://openwall.com/lists/oss-security/2010/12/15/7
http://openwall.com/lists/oss-security/2010/12/15/3
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=ed3aada1bf34c5a9e98af167f125f8a740fc726a
http://xforce.iss.net/xforce/xfdb/64155
http://www.vupen.com/english/advisories/2011/0298
http://www.vupen.com/english/advisories/2011/0012
http://www.securityfocus.com/bid/45408
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.36.2
http://www.exploit-db.com/exploits/15774/
http://secunia.com/advisories/42778
http://lists.opensuse.org/opensuse-security-announce/2011-02/msg00000.html
http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00000.html
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