Linux Kernel L2 Emulation race condition

CVSS Meta Temp Score
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CTI Interest Score
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4.5$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in Linux Kernel. This issue affects some unknown processing of the component L2 Emulation. Such manipulation leads to race condition. This vulnerability is traded as CVE-2014-7842. There is no exploit available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Linux Kernel (Operating System) (the affected version unknown). Affected by this issue is an unknown part of the component L2 Emulation. The manipulation with an unknown input leads to a race condition vulnerability. Using CWE to declare the problem leads to 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. Impacted is availability.

The weakness was shared 11/13/2014 by Nadav Amit as Bug 1163762 as confirmed bug report (Bugzilla). The advisory is shared for download at bugzilla.redhat.com. This vulnerability is handled as CVE-2014-7842 since 10/03/2014. The exploitation is known to be difficult. The attack needs to be approached locally. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 80511 (Ubuntu 12.04 LTS : linux vulnerabilities (USN-2463-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 167678 (SUSE Enterprise Linux Security update for Linux kernel (SUSE-SU-2015:0652-1)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org.

The vulnerability is also documented in the databases at X-Force (98658), Tenable (80511), SecurityFocus (BID 71078†), Secunia (SA62305†) and Vulnerability Center (SBV-47332†). The entries VDB-10840, VDB-12213, VDB-13142 and VDB-67533 are related to this item. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.1
VulDB Meta Temp Score: 4.5

VulDB Base Score: 5.1
VulDB Temp Score: 4.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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Exploitinginfo

Class: Race condition
CWE: CWE-362
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: 80511
Nessus Name: Ubuntu 12.04 LTS : linux vulnerabilities (USN-2463-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 867487
OpenVAS Name: Fedora Update for kernel FEDORA-2014-17283
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: a2b9e6c1a35afcc0973acb72e591c714e78885ff

Timelineinfo

10/03/2014 🔍
11/13/2014 +41 days 🔍
11/13/2014 +0 days 🔍
11/13/2014 +0 days 🔍
11/14/2014 +1 days 🔍
11/29/2014 +15 days 🔍
12/01/2014 +2 days 🔍
01/14/2015 +44 days 🔍
01/14/2015 +0 days 🔍
02/24/2022 +2598 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: Bug 1163762
Researcher: Nadav Amit
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-7842 (🔍)
GCVE (CVE): GCVE-0-2014-7842
GCVE (VulDB): GCVE-100-68204
X-Force: 98658 - Linux Kernel emulation failures denial of service, Medium Risk
SecurityFocus: 71078 - Linux Kernel KVM CVE-2014-7842 Local Denial of Service Vulnerability
Secunia: 62305 - Ubuntu update for kernel, Moderately Critical
Vulnerability Center: 47332 - Linux Kernel before 3.17.4 Local DoS via an MMIO Transaction or a PIO Transaction, Medium

See also: 🔍

Entryinfo

Created: 11/14/2014 12:21
Updated: 02/24/2022 19:59
Changes: 11/14/2014 12:21 (80), 06/13/2017 08:36 (3), 02/24/2022 19:52 (4), 02/24/2022 19:59 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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