Linux Kernel 3.14.1/3.14.2/3.14.3/3.14.4/3.14.5 HugeTLB File System mempolicy.c hugetlb_entry race condition

CVSS Meta Temp Score
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4.9$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Linux Kernel 3.14.1/3.14.2/3.14.3/3.14.4/3.14.5. The affected element is the function hugetlb_entry of the file mempolicy.c of the component HugeTLB File System. Performing a manipulation results in race condition. This vulnerability is reported as CVE-2014-3940. No exploit exists. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability classified as problematic has been found in Linux Kernel 3.14.1/3.14.2/3.14.3/3.14.4/3.14.5 (Operating System). This affects the function hugetlb_entry of the file mempolicy.c of the component HugeTLB File System. The manipulation with an unknown input leads to a race condition vulnerability. CWE is classifying the issue as CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. This is going to have an impact on integrity, and availability.

The weakness was disclosed 03/06/2014 by Prasad J Pandit as Bug 1104097 as confirmed bug report (Bugzilla). The advisory is shared at bugzilla.redhat.com. This vulnerability is uniquely identified as CVE-2014-3940 since 06/02/2014. The exploitability is told to be difficult. An attack has to be approached locally. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available. The advisory points out:

Linux kernel built with the HugeTLB file system(CONFIG_HUGETLBFS + CONFIG_HUGETLB_PAGE) along with Non Uniform Memory Access(CONFIG_NUMA) support is vulnerable to possible race conditions. It could occur when kernel attempts to perform hugepage migration.

The vulnerability scanner Nessus provides a plugin with the ID 78491 (F5 Networks BIG-IP : Linux kernel vulnerability (SOL15685)), 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 124116 (CentOS Security Update for kernel (CESA-2015:1272)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at lkml.org. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (93561), Tenable (78491), SecurityFocus (BID 67786†), Secunia (SA59011†) and Vulnerability Center (SBV-46906†). Further details are available at seclists.org. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
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CVSSv3info

VulDB Meta Base Score: 5.1
VulDB Meta Temp Score: 4.9

VulDB Base Score: 5.1
VulDB Temp Score: 4.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Race condition
CWE: CWE-362
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 78491
Nessus Name: F5 Networks BIG-IP : Linux kernel vulnerability (SOL15685)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 800909
OpenVAS Name: Fedora Update for kernel FEDORA-2015-5024
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: lkml.org

Timelineinfo

03/06/2014 🔍
03/18/2014 +12 days 🔍
06/02/2014 +76 days 🔍
06/02/2014 +0 days 🔍
06/02/2014 +0 days 🔍
06/04/2014 +2 days 🔍
06/05/2014 +1 days 🔍
06/11/2014 +6 days 🔍
10/16/2014 +127 days 🔍
11/05/2014 +20 days 🔍
06/20/2021 +2419 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: Bug 1104097
Researcher: Prasad J Pandit
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-3940 (🔍)
GCVE (CVE): GCVE-0-2014-3940
GCVE (VulDB): GCVE-100-13437

OVAL: 🔍

X-Force: 93561 - Linux Kernel hugetlb_entry unspecified, Low Risk
SecurityFocus: 67786 - Linux Kernel CVE-2014-3940 Unspecified Security Vulnerability
Secunia: 59011 - Linux Kernel HugeTLB Entries Denial of Service Vulnerability, Not Critical
Vulnerability Center: 46906 - Linux Kernel through 3.14.5 Local DoS Vulnerability, Medium

Misc.: 🔍

Entryinfo

Created: 06/05/2014 00:15
Updated: 06/20/2021 15:18
Changes: 06/05/2014 00:15 (81), 06/11/2017 05:03 (11), 06/20/2021 15:12 (3), 06/20/2021 15:18 (1)
Complete: 🔍
Cache ID: 216:E62:103

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