VDB-1723 · CVE-2005-2797 · BID 14727

OpenBSD OpenSSH 4.0 Dynamic Port Forwarding denial of service

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.
5.1$0-$5k0.00

A vulnerability has been found in OpenBSD OpenSSH 4.0 (Connectivity Software) and classified as problematic. Affected by this vulnerability is an unknown functionality of the component Dynamic Port Forwarding. The manipulation with an unknown input 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 integrity. The summary by CVE is:

OpenSSH 4.0, and other versions before 4.2, does not properly handle dynamic port forwarding ("-D" option) when a listen address is not provided, which may cause OpenSSH to enable the GatewayPorts functionality.

The bug was discovered 09/02/2005. The weakness was presented 09/02/2005 with OpenBSD Team (Website). It is possible to read the advisory at openbsd.org. This vulnerability is known as CVE-2005-2797 since 09/06/2005. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 19592 (OpenSSH < 4.2 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Misc. and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 38470 (OpenSSH DynamicForward Inadvertent GatewayPorts Activation Vulnerability).

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at ftp.openbsd.org. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (19592). See 1724 and 26219 for similar entries.

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: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

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

NVD Base Score: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
ATT&CK: T1499

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Dayunlockunlockunlockunlock
Todayunlockunlockunlockunlock

Nessus ID: 19592
Nessus Name: OpenSSH < 4.2 Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 65169
OpenVAS Name: SLES9: Security update for openssh,openssh-askpass
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Patch: ftp.openbsd.org

Timelineinfo

09/01/2005 🔍
09/01/2005 +0 days 🔍
09/02/2005 +1 days 🔍
09/02/2005 +0 days 🔍
09/02/2005 +0 days 🔍
09/02/2005 +0 days 🔍
09/05/2005 +2 days 🔍
09/06/2005 +1 days 🔍
09/06/2005 +0 days 🔍
09/07/2005 +1 days 🔍
07/04/2019 +5048 days 🔍

Sourcesinfo

Vendor: openbsd.org

Advisory: openbsd.org
Researcher: http://www.openbsd.org
Organization: OpenBSD Team
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2005-2797 (🔍)
SecurityTracker: 1014845
SecurityFocus: 14727 - OpenSSH DynamicForward Inadvertent GatewayPorts Activation Vulnerability
Secunia: 18661 - Avaya Intuity Audix Two OpenSSH Security Issues, Less Critical
OSVDB: 19141 - OpenSSH GSSAPIAuthentication Credential Escalation

See also: 🔍

Entryinfo

Created: 09/05/2005 12:10
Updated: 07/04/2019 10:53
Changes: 09/05/2005 12:10 (87), 07/04/2019 10:53 (2)
Complete: 🔍

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Interested in the pricing of exploits?

See the underground prices here!