Linux Kernel 2.6.39 mem_write access control

CVSS Meta Temp Score
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CTI Interest Score
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7.6$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Linux Kernel 2.6.39. This affects the function mem_write. The manipulation leads to access control. This vulnerability is traded as CVE-2012-0056. Furthermore, there is an exploit available.

Detailsinfo

A vulnerability was found in Linux Kernel 2.6.39 (Operating System). It has been rated as critical. This issue affects the function mem_write. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-264. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The mem_write function in Linux kernel 2.6.39 and other versions, 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.

The issue has been introduced in 05/18/2011. The weakness was shared 01/27/2012 by zx2c4 as Bug 782642 as confirmed bug report (Bugzilla). The advisory is shared at bugzilla.redhat.com. The identification of this vulnerability is CVE-2012-0056 since 12/07/2011. An attack has to be approached locally. No form of authentication is needed for a successful exploitation. Technical details as well as a public exploit are known. MITRE ATT&CK project uses the attack technique T1068 for this issue.

A public exploit has been developed by zx2c4 in ANSI C and been published even before and not after the advisory. The exploit is available at securityfocus.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 254 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 68435 (Oracle Linux 6 : kernel (ELSA-2012-0052)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 195250 (Ubuntu Security Notification for Linux-Ti-Omap4 Vulnerabilities (USN-1364-1)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Exploit-DB (18411), Tenable (68435), SecurityFocus (BID 51625†), Secunia (SA47708†) and Vulnerability Center (SBV-34306†). The entry VDB-60026 is related to this item. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.4
VulDB Meta Temp Score: 7.6

VulDB Base Score: 8.4
VulDB Temp Score: 7.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: zx2c4
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 68435
Nessus Name: Oracle Linux 6 : kernel (ELSA-2012-0052)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 881102
OpenVAS Name: CentOS Update for kernel CESA-2012:0052 centos6
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Patch: e268337dfe26dfc7efd422a804dbb27977a3cccc
Fortigate IPS: 🔍

Timelineinfo

05/18/2011 🔍
12/07/2011 +203 days 🔍
01/23/2012 +47 days 🔍
01/23/2012 +0 days 🔍
01/23/2012 +0 days 🔍
01/23/2012 +0 days 🔍
01/24/2012 +1 days 🔍
01/24/2012 +0 days 🔍
01/27/2012 +3 days 🔍
01/27/2012 +0 days 🔍
07/12/2013 +532 days 🔍
03/23/2015 +619 days 🔍
12/24/2024 +3564 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: Bug 782642
Researcher: zx2c4
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2012-0056 (🔍)
GCVE (CVE): GCVE-0-2012-0056
GCVE (VulDB): GCVE-100-60029

OVAL: 🔍

CERT: 🔍
SecurityFocus: 51625 - Linux Kernel CVE-2012-0056 Local Privilege Escalation Vulnerability
Secunia: 47708 - Red Hat update for kernel, Less Critical
Vulnerability Center: 34306 - Linux Kernel 2.6.x '/proc/<pid>/mem\x27 Local Privileges Escalation Vulnerability, High

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 03/23/2015 16:50
Updated: 12/24/2024 02:09
Changes: 03/23/2015 16:50 (70), 04/09/2017 13:37 (20), 11/29/2021 09:03 (4), 11/29/2021 09:07 (1), 10/18/2024 07:49 (16), 12/24/2024 02:09 (3)
Complete: 🔍
Cache ID: 216::103

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