Linux Kernel 2.6.16.9 dccp_rcv_state_process null pointer dereference

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.
7.5$0-$5k0.00

A vulnerability, which was classified as critical, has been found in Linux Kernel 2.6.16.9 (Operating System). Affected by this issue is the function dccp_rcv_state_process. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. CVE summarizes:

The dccp_rcv_state_process function in net/dccp/input.c in the Datagram Congestion Control Protocol (DCCP) implementation in the Linux kernel before 2.6.38 does not properly handle packets for a CLOSED endpoint, which allows remote attackers to cause a denial of service (NULL pointer dereference and OOPS) by sending a DCCP-Close packet followed by a DCCP-Reset packet.

The issue has been introduced in 03/20/2006. The weakness was disclosed 07/18/2011 as Bug 682954 as not defined bug report (Bugzilla). The advisory is available at bugzilla.redhat.com. This vulnerability is handled as CVE-2011-1093 since 02/24/2011. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 11/14/2021).

The vulnerability was handled as a non-public zero-day exploit for at least 1946 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 67081 (CentOS 5 : kernel (CESA-2011:0833)), 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 165558 (SUSE Enterprise Linux Security Update Linux Kernel (SUSE-SA:2011:019)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (67081). The entries 4261, 55715, 57033 and 56997 are pretty similar.

Productinfo

Type

Vendor

Name

Version

License

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: 7.5

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

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Dayunlockunlockunlockunlock
Todayunlockunlockunlockunlock

Nessus ID: 67081
Nessus Name: CentOS 5 : kernel (CESA-2011:0833)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 69970
OpenVAS Name: Debian Security Advisory DSA 2264-1 (linux-2.6)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Patch: 720dc34bbbe9493c7bd48b2243058b4e447a929d

Timelineinfo

03/20/2006 🔍
02/24/2011 +1802 days 🔍
03/08/2011 +12 days 🔍
03/08/2011 +0 days 🔍
03/09/2011 +1 days 🔍
07/18/2011 +131 days 🔍
07/18/2011 +0 days 🔍
03/23/2015 +1344 days 🔍
11/14/2021 +2428 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: Bug 682954
Status: Not defined
Confirmation: 🔍

CVE: CVE-2011-1093 (🔍)
OVAL: 🔍
IAVM: 🔍

Vulnerability Center: 30263 - Linux Kernel 2.6 Through 2.6.38-rc2 Remote Denial of Service Vulnerability via Crafted Packets, Medium
SecurityFocus: 46793 - Linux Kernel 'oops' on Reset NULL Pointer Dereference Remote Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 03/23/2015 16:50
Updated: 11/14/2021 17:05
Changes: 03/23/2015 16:50 (63), 03/18/2017 08:04 (14), 11/14/2021 16:57 (4), 11/14/2021 17:05 (1)
Complete: 🔍
Cache ID: 3:240:103

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you know our Splunk app?

Download it now for free!