Linux Kernel 3.11-rc1 kernel/timer.c br_multicast_del_pg input validation

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in Linux Kernel 3.11-rc1. The impacted element is the function br_multicast_del_pg of the file kernel/timer.c. Executing a manipulation can lead to input validation. The identification of this vulnerability is CVE-2013-4129. There is no exploit available. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability has been found in Linux Kernel 3.11-rc1 (Operating System) and classified as problematic. This vulnerability affects the function br_multicast_del_pg of the file kernel/timer.c. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect availability. CVE summarizes:

The bridge multicast implementation in the Linux kernel through 3.10.3 does not check whether a certain timer is armed before modifying the timeout value of that timer, which allows local users to cause a denial of service (BUG and system crash) via vectors involving the shutdown of a KVM virtual machine, related to net/bridge/br_mdb.c and net/bridge/br_multicast.c.

The weakness was shared 07/07/2013 by Petr Matousek as not defined mailinglist post (oss-sec). The advisory is shared for download at seclists.org. This vulnerability was named CVE-2013-4129 since 06/12/2013. The exploitation appears to be easy. The attack needs to be approached locally. A single authentication is necessary for exploitation. There are known technical details, but no exploit is available.

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 immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (85763), SecurityFocus (BID 61193†), OSVDB (95253†) and Vulnerability Center (SBV-40563†). The entries VDB-9546 and VDB-9545 are related to this item. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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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: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Input validation
CWE: CWE-20
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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Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: git.kernel.org

Timelineinfo

06/12/2013 🔍
07/07/2013 +25 days 🔍
07/07/2013 +0 days 🔍
07/16/2013 +9 days 🔍
07/16/2013 +0 days 🔍
07/17/2013 +1 days 🔍
07/18/2013 +1 days 🔍
07/29/2013 +11 days 🔍
05/06/2017 +1377 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: seclists.org
Researcher: Petr Matousek
Status: Not defined
Confirmation: 🔍

CVE: CVE-2013-4129 (🔍)
GCVE (CVE): GCVE-0-2013-4129
GCVE (VulDB): GCVE-100-9544
X-Force: 85763
SecurityFocus: 61193 - Linux Kernel CVE-2013-4129 Remote Denial of Service Vulnerability
OSVDB: 95253
Vulnerability Center: 40563 - Linux Kernel 3.11 Rc1 Remote Denial of Service Related to the mp-\x3Etimer Timer, Medium

See also: 🔍

Entryinfo

Created: 07/18/2013 11:35
Updated: 05/06/2017 19:06
Changes: 07/18/2013 11:35 (67), 05/06/2017 19:06 (2)
Complete: 🔍
Committer:
Cache ID: 216:74E:103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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