OpenBSD OpenSSH 4.0 GSSAPIDelegateCredentials denial of service

CVSS Meta Temp Score
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CTI Interest Score
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4.1$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in OpenBSD OpenSSH 4.0. This affects the function GSSAPIDelegateCredentials. Such manipulation leads to denial of service. This vulnerability is traded as CVE-2005-2797. The attack may be launched remotely. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in OpenBSD OpenSSH 4.0 (Connectivity Software) and classified as problematic. Affected by this issue is the function GSSAPIDelegateCredentials. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is confidentiality. CVE summarizes:

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 shared 09/02/2005 by Paul Moore (Website). The advisory is shared for download at openbsd.org. This vulnerability is handled as CVE-2005-2797 since 09/06/2005. The attack may be launched remotely. A simple authentication is required for exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1499.

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 to version 4.2p1 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 X-Force (22115), Tenable (19592), SecurityFocus (BID 14727†), OSVDB (19141†) and Secunia (SA16686†). The entries VDB-1723, VDB-26219 and VDB-82896 are related to this item. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
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NVD Base Score: 🔍

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: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: OpenSSH 4.2p1
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 🔍
09/02/2005 +0 days 🔍
09/05/2005 +2 days 🔍
09/06/2005 +1 days 🔍
09/06/2005 +0 days 🔍
09/07/2005 +1 days 🔍
10/19/2005 +42 days 🔍
07/04/2019 +5006 days 🔍

Sourcesinfo

Vendor: openbsd.org

Advisory: openbsd.org
Researcher: Paul Moore
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2005-2797 (🔍)
GCVE (CVE): GCVE-0-2005-2797
GCVE (VulDB): GCVE-100-1724
X-Force: 22115
SecurityFocus: 14727 - OpenSSH DynamicForward Inadvertent GatewayPorts Activation Vulnerability
Secunia: 16686 - OpenSSH Two Security Issues, Less Critical
OSVDB: 19141 - OpenSSH GSSAPIAuthentication Credential Escalation
SecurityTracker: 1014845
Vulnerability Center: 9425 - OpenSSH May Accidentally Enable GatewayPorts, Medium

See also: 🔍

Entryinfo

Created: 09/05/2005 12:10
Updated: 07/04/2019 11:01
Changes: 09/05/2005 12:10 (94), 07/04/2019 11:01 (2)
Complete: 🔍
Cache ID: 216:134:103

Once again VulDB remains the best source for vulnerability data.

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