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

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 vulnerability database at X-Force (85763). The entries 9546 and 9545 are related to this item.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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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: 🔍

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

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Current Price Estimation: 🔍

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Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

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: 🔍

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