OpenBSD OpenSSH 4.5 packet.c denial of service

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

A vulnerability was found in OpenBSD OpenSSH 4.5 (Connectivity Software). It has been classified as problematic. Affected is an unknown part of the file packet.c. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. CVE summarizes:

packet.c in ssh in OpenSSH allows remote attackers to cause a denial of service (crash) by sending an invalid protocol sequence with USERAUTH_SUCCESS before NEWKEYS, which causes newkeys[mode] to be NULL.

The bug was discovered 09/28/2006. The weakness was disclosed 09/28/2006 (Website). The advisory is shared for download at bugs.gentoo.org. This vulnerability is traded as CVE-2006-4925 since 09/21/2006. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 44077 (OpenSSH < 4.5 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 38560 (OpenSSH Signal Handling Vulnerability).

Upgrading to version 4.5 eliminates this vulnerability. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (35167) and Tenable (44077). The entries 2578, 2667, 32699 and 32512 are pretty similar.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
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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
ATT&CK: T1499

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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Nessus ID: 44077
Nessus Name: OpenSSH < 4.5 Multiple Vulnerabilities
Nessus File: 🔍
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OpenVAS ID: 65248
OpenVAS Name: SLES9: Security update for OpenSSH
OpenVAS File: 🔍
OpenVAS Family: 🔍

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Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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Upgrade: OpenSSH 4.5

Timelineinfo

09/21/2006 🔍
09/28/2006 +7 days 🔍
09/28/2006 +0 days 🔍
09/28/2006 +0 days 🔍
09/28/2006 +0 days 🔍
11/08/2006 +41 days 🔍
11/22/2006 +14 days 🔍
11/23/2006 +1 days 🔍
10/04/2011 +1776 days 🔍
03/12/2015 +1255 days 🔍
07/11/2019 +1582 days 🔍

Sourcesinfo

Vendor: openbsd.org

Advisory: bugs.gentoo.org
Status: Not defined
Confirmation: 🔍

CVE: CVE-2006-4925 (🔍)
X-Force: 35167
Vulnerability Center: 13123 - OpenSSH Denial of Service Vulnerability in packet.c, Medium
SecurityFocus: 20956
Secunia: 23038 - IBM HMC OpenSSH / OpenSSL Vulnerabilities, Highly Critical
OSVDB: 29494 - CVE-2006-4925 - OpenSSH - Denial of Service Issue

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Entryinfo

Created: 03/12/2015 15:51
Updated: 07/11/2019 06:44
Changes: 03/12/2015 15:51 (77), 07/11/2019 06:44 (5)
Complete: 🔍

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