Linux Kernel up to 3.14.2 mm/rmap.c try_to_unmap_cluster access control

CVSS Meta Temp Score
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CTI Interest Score
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4.8$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Linux Kernel up to 3.14.2. The impacted element is the function try_to_unmap_cluster of the file mm/rmap.c. This manipulation causes access control. This vulnerability is handled as CVE-2014-3122. There is not any exploit available. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability classified as problematic was found in Linux Kernel up to 3.14.2 (Operating System). Affected by this vulnerability is the function try_to_unmap_cluster of the file mm/rmap.c. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect availability. The summary by CVE is:

The try_to_unmap_cluster function in mm/rmap.c in the Linux kernel before 3.14.3 does not properly consider which pages must be locked, which allows local users to cause a denial of service (system crash) by triggering a memory-usage pattern that requires removal of page-table mappings.

The issue has been introduced in 10/19/2008. The weakness was released 05/02/2014 by Sasha Levin as mm: try_to_unmap_cluster() should lock_page() before mlocking (oss-sec). The advisory is shared at openwall.com. This vulnerability is known as CVE-2014-3122 since 04/29/2014. The exploitation appears to be easy. An attack has to be approached locally. A single authentication is required for exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1068 for this issue. Responsible for the vulnerability is the following code: 

mlock_vma_page(page);   /* no-op if already mlocked */
if (page == check_page)

The vulnerability was handled as a non-public zero-day exploit for at least 1996 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 79340 (F5 Networks BIG-IP : Linux kernel vulnerability (SOL15852)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family F5 Networks Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 167228 (SUSE Enterprise Linux Security Update for Linux Kernel (SUSE-SU-2014:0807-1)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (92891), Tenable (79340), SecurityFocus (BID 67162†), Secunia (SA58091†) and Vulnerability Center (SBV-44472†). Additional details are provided at git.kernel.org. Entries connected to this vulnerability are available at VDB-11302, VDB-11755, VDB-12214 and VDB-12411. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.5
VulDB Temp Score: 4.8
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: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 79340
Nessus Name: F5 Networks BIG-IP : Linux kernel vulnerability (SOL15852)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 702926
OpenVAS Name: Debian Security Advisory DSA 2926-1 (linux - security update
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: git.kernel.org

Timelineinfo

10/19/2008 🔍
04/07/2014 +1995 days 🔍
04/07/2014 +0 days 🔍
04/07/2014 +0 days 🔍
04/29/2014 +22 days 🔍
05/02/2014 +3 days 🔍
05/02/2014 +0 days 🔍
05/05/2014 +3 days 🔍
05/11/2014 +6 days 🔍
05/13/2014 +2 days 🔍
11/20/2014 +191 days 🔍
06/19/2021 +2403 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: mm: try_to_unmap_cluster() should lock_page() before mlocking
Researcher: Sasha Levin
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-3122 (🔍)
GCVE (CVE): GCVE-0-2014-3122
GCVE (VulDB): GCVE-100-13141

OVAL: 🔍

X-Force: 92891 - Linux Kernel try_to_unmap_cluster() function denial of service, Medium Risk
SecurityFocus: 67162
Secunia: 58091 - Linux Kernel "try_to_unmap_cluster()" Denial of Service Vulnerability, Not Critical
Vulnerability Center: 44472 - Linux Kernel before 3.14.3 Local DoS Vulnerability due Improper Page Table Mapping in rmap.c, Medium

Misc.: 🔍
See also: 🔍

Entryinfo

Created: 05/05/2014 13:27
Updated: 06/19/2021 09:57
Changes: 05/05/2014 13:27 (86), 05/28/2017 02:41 (2), 06/19/2021 09:56 (4), 06/19/2021 09:57 (1)
Complete: 🔍
Cache ID: 216:CAC:103

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