CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.2	$0-$5k	0.00

A vulnerability has been found in Linux Kernel 2.6.18 (Operating System) and classified as critical. This vulnerability affects some unknown functionality of the component OMAP4 Bridge Networking Interface. The manipulation with the input value korruptes Paket leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability. CVE summarizes:

A certain Red Hat patch to the __br_deliver function in net/bridge/br_forward.c in the Linux kernel 2.6.18 on Red Hat Enterprise Linux (RHEL) 5 allows remote attackers to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact by leveraging connectivity to a network interface that uses an Ethernet bridge device.

The issue has been introduced in 09/20/2006. The weakness was presented 12/13/2011 (Website). The advisory is shared for download at wiki.openvz.org. This vulnerability was named CVE-2011-2942 since 07/27/2011. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1499.

The vulnerability was handled as a non-public zero-day exploit for at least 1910 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 56569 (CentOS 5 : kernel (CESA-2011:1386)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 195183 (Ubuntu Security Notification for Linux-lts-Backport-Oneiric Vulnerabilities (USN-1294-1)).

Applying the patch RHSA-2011-1386 is able to eliminate this problem. The bugfix is ready for download at rhn.redhat.com. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (56569). See 60957, 58127 and 57788 for similar entries.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 2.6.18

License

• open-source

CPE 2.3info

• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍

CVSSv4info

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

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 56569
Nessus Name: CentOS 5 : kernel (CESA-2011:1386)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 881021
OpenVAS Name: CentOS Update for kernel CESA-2011:1386 centos5 i386
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: RHSA-2011-1386

Timelineinfo

09/20/2006 🔍
07/27/2011 +1771 days 🔍
10/20/2011 +85 days 🔍
10/20/2011 +0 days 🔍
10/21/2011 +1 days 🔍
10/23/2011 +2 days 🔍
12/13/2011 +51 days 🔍
12/13/2011 +0 days 🔍
12/13/2011 +0 days 🔍
01/21/2012 +38 days 🔍
06/08/2013 +504 days 🔍
03/20/2021 +2842 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: wiki.openvz.org
Status: Not defined
Confirmation: 🔍

CVE: CVE-2011-2942 (🔍)
OVAL: 🔍

Vulnerability Center: 33590 - Red Hat Enterprise Linux and Enterprise Linux Desktop Ethernet Bridge Remote DoS Vulnerability, Medium
SecurityFocus: 50313 - Red Hat Linux Kernel Ethernet Bridge Interface Denial of Service Vulnerability
Secunia: 46543 - Red Hat update for kernel, Less Critical
OSVDB: 77684

See also: 🔍

Entryinfo

Created: 01/21/2012 01:00
Updated: 03/20/2021 07:22
Changes: 01/21/2012 01:00 (76), 09/05/2019 13:38 (9), 03/20/2021 07:22 (2)
Complete: 🔍

Discussion

Want to stay up to date on a daily basis?

Enable the mail alert feature now!