Vulnerability CVE-2011-2184
Published: 2011-09-06   Modified: 2012-02-13

Description:
The key_replace_session_keyring function in security/keys/process_keys.c in the Linux kernel before 2.6.39.1 does not initialize a certain structure member, which allows local users to cause a denial of service (NULL pointer dereference and OOPS) or possibly have unspecified other impact via a KEYCTL_SESSION_TO_PARENT argument to the keyctl function, a different vulnerability than CVE-2010-2960.

See advisories in our WLB2 database:
Topic
Author
Date
High
linux kernel 2.6.39 cred->user_ns in key_replace_session_keyring
Robert Swiecki
13.09.2011

Type:

CWE-Other

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

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.2/10
10/10
3.9/10
Exploit range
Attack complexity
Authentication
Local
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Complete
Complete
Complete
Affected software
Linux -> Kernel 

 References:
https://lkml.org/lkml/2011/5/25/265
http://www.openwall.com/lists/oss-security/2011/06/06/2
http://www.openwall.com/lists/oss-security/2011/06/03/2
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f7285b5d631fd6096b11c6af0058ed3a2b30ef4e
https://lkml.org/lkml/2011/5/24/502
https://lkml.org/lkml/2011/5/23/199
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39.1
http://securityreason.com/securityalert/8371
http://alt.swiecki.net/linux_kernel/sys_open-kmem_cache_alloc-2.6.39-rc4.txt
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