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Last updated: 1/6/2016 7:31:44 AM

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National Cyber Awareness System

Vulnerability Summary for CVE-2012-0056

Original release date: 01/27/2012
Last revised: 07/17/2014
Source: US-CERT/NIST

Overview

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.

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score: 6.9 (MEDIUM) (AV:L/AC:M/Au:N/C:C/I:C/A:C) (legend)
Impact Subscore: 10.0
Exploitability Subscore: 3.4
CVSS Version 2 Metrics:
Access Vector: Locally exploitable
Access Complexity: Medium
Authentication: Not required to exploit
Impact Type: Allows unauthorized disclosure of information; Allows unauthorized modification; Allows disruption of service

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External Source: MLIST
Name: [oss-security] 20120118 CVE request: kernel: proc: clean up and fix /proc/<pid>/mem handling
Hyperlink: http://www.openwall.com/lists/oss-security/2012/01/18/1
External Source: BID
Name: 51625
Hyperlink: http://www.securityfocus.com/bid/51625
External Source: MISC
Name: http://blog.zx2c4.com/749
Hyperlink: http://blog.zx2c4.com/749
External Source: MLIST
Name: [oss-security] 20120117 Re: CVE request: kernel: proc: clean up and fix /proc/<pid>/mem handling
Hyperlink: http://www.openwall.com/lists/oss-security/2012/01/18/2
External Source: CONFIRM
Name: http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.2
Hyperlink: http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.2
External Source: MLIST
Name: [oss-security] 20120119 Re: CVE request: kernel: proc: clean up and fix /proc/<pid>/mem handling
Hyperlink: http://www.openwall.com/lists/oss-security/2012/01/19/4
External Source: UBUNTU
Name: USN-1336-1
Hyperlink: http://ubuntu.com/usn/usn-1336-1
External Source: CONFIRM
Name: https://bugzilla.redhat.com/show_bug.cgi?id=782642
Hyperlink: https://bugzilla.redhat.com/show_bug.cgi?id=782642
External Source: REDHAT
Name: RHSA-2012:0061
Hyperlink: http://www.redhat.com/support/errata/RHSA-2012-0061.html
External Source: CONFIRM
Name: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=e268337dfe26dfc7efd422a804dbb27977a3cccc
Hyperlink: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=e268337dfe26dfc7efd422a804dbb27977a3cccc
External Source: MLIST
Name: [oss-security] 20120122 Re: CVE request: kernel: proc: clean up and fix /proc/<pid>/mem handling
Hyperlink: http://www.openwall.com/lists/oss-security/2012/01/22/4
External Source: REDHAT
Name: RHSA-2012:0052
Hyperlink: http://www.redhat.com/support/errata/RHSA-2012-0052.html

Vulnerable software and versions

+ Configuration 1
+ OR
* cpe:/o:linux:linux_kernel:2.6.39

* Denotes Vulnerable Software
Changes related to vulnerability configurations

Technical Details

Vulnerability Type (View All)
  • Permissions, Privileges, and Access Control (CWE-264)
CVE Standard Vulnerability Entry http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-0056