Vulnerability CVE-2012-0056


Published: 2012-01-27   Modified: 2012-02-13

Description:
The mem_write function in the Linux kernel before 3.2.2, when ASLR is disabled, does not properly check permissions when writing to /proc/<pid>/mem, which allows local users to gain privileges by modifying process memory, as demonstrated by Mempodipper.

See advisories in our WLB2 database:
Topic
Author
Date
High
Mempodipper - Linux local root for >=2.6.39 32/64
zx2c4
23.01.2012

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 
Linux -> Linux kernel 

 References:
http://blog.zx2c4.com/749
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=e268337dfe26dfc7efd422a804dbb27977a3cccc
http://ubuntu.com/usn/usn-1336-1
http://www.kb.cert.org/vuls/id/470151
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.2
http://www.openwall.com/lists/oss-security/2012/01/18/1
http://www.openwall.com/lists/oss-security/2012/01/18/2
http://www.openwall.com/lists/oss-security/2012/01/19/4
http://www.openwall.com/lists/oss-security/2012/01/22/4
http://www.redhat.com/support/errata/RHSA-2012-0052.html
http://www.redhat.com/support/errata/RHSA-2012-0061.html
http://www.securityfocus.com/bid/51625
https://bugzilla.redhat.com/show_bug.cgi?id=782642

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