OpenBSD OpenSSH 4.0 Dynamic Port Forwarding denial of service

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in OpenBSD OpenSSH 4.0. The impacted element is an unknown function of the component Dynamic Port Forwarding. This manipulation causes denial of service. This vulnerability appears as CVE-2005-2797. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

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 databases at Tenable (19592), SecurityFocus (BID 14727†), OSVDB (19141†), Secunia (SA18661†) and SecurityTracker (ID 1014845†). See VDB-1724 and VDB-26219 for similar entries. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
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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

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VulDB Base Score: 🔍
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Exploitinginfo

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

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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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: 🔍
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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 🔍
07/12/2024 +6883 days 🔍

Sourcesinfo

Vendor: openbsd.org

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

CVE: CVE-2005-2797 (🔍)
GCVE (CVE): GCVE-0-2005-2797
GCVE (VulDB): GCVE-100-1723
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
SecurityTracker: 1014845
Vulnerability Center: 9425

See also: 🔍

Entryinfo

Created: 09/05/2005 12:10
Updated: 07/12/2024 04:32
Changes: 09/05/2005 12:10 (87), 07/04/2019 10:53 (2), 07/12/2024 04:32 (17)
Complete: 🔍
Cache ID: 216:968:103

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