l2tpns 1.1/2.0.13/2.1 cluster.c cluster_process_heartbeat memory corruption

EntryHistoryDiffjsonxmlCTI

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.
6.7	$0-$5k	0.00

A vulnerability was found in l2tpns 1.1/2.0.13/2.1. It has been declared as critical. This vulnerability affects the function cluster_process_heartbeat of the file cluster.c. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect availability. CVE summarizes:

Buffer overflow in the cluster_process_heartbeat function in cluster.c in layer 2 tunneling protocol network server (l2tpns) before 2.1.21 allows remote attackers to cause a denial of service via a large heartbeat packet.

The bug was discovered 12/02/2006. The weakness was shared 12/11/2006 by Rhys Kidd (Website). The advisory is shared for download at xforce.iss.net. This vulnerability was named CVE-2006-5873 since 11/14/2006. 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.

It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 6 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 23791 (Debian DSA-1230-1 : l2tpns - buffer overflow), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l.

Upgrading to version 2.1.21 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (30732) and Tenable (23791).

Productinfo

Name

l2tpns

Version

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: 6.7

VulDB Base Score: 7.5
VulDB Temp Score: 6.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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

Nessus ID: 23791
Nessus Name: Debian DSA-1230-1 : l2tpns - buffer overflow
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: l2tpns 2.1.21

Timelineinfo

11/14/2006 🔍
12/02/2006 +18 days 🔍
12/02/2006 +0 days 🔍
12/05/2006 +3 days 🔍
12/08/2006 +3 days 🔍
12/11/2006 +3 days 🔍
12/11/2006 +0 days 🔍
12/11/2006 +0 days 🔍
12/18/2006 +7 days 🔍
03/12/2015 +3006 days 🔍
07/12/2019 +1583 days 🔍

Sourcesinfo

Advisory: xforce.iss.net
Researcher: Rhys Kidd
Status: Not defined
Confirmation: 🔍

CVE: CVE-2006-5873 (🔍)
X-Force: 30732
Vulnerability Center: 13366 - l2tpns Denial of Service in the cluster_process_heartbeat Function, Medium
SecurityFocus: 21443 - L2TPNS Heartbeat Handling Denial of Service Vulnerability
Secunia: 23230
OSVDB: 31780 - L2TPNS - Heartbeat Handling - Denial of Service Issue
Vupen: ADV-2006-4860

Entryinfo

Created: 03/12/2015 22:21
Updated: 07/12/2019 08:02
Changes: 03/12/2015 22:21 (69), 07/12/2019 08:02 (7)
Complete: 🔍