Blue Coat Security Gateway OS 4.x SSH Server resource management

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Blue Coat Security Gateway OS 4.x. Impacted is an unknown function of the component SSH Server. This manipulation causes resource management. This vulnerability appears as CVE-2006-4924. In addition, an exploit is available. It is advised to disable the affected component.

Detailsinfo

A vulnerability classified as problematic was found in Blue Coat Security Gateway OS 4.x. Affected by this vulnerability is some unknown functionality of the component SSH Server. The manipulation with an unknown input leads to a resource management vulnerability. The CWE definition for the vulnerability is CWE-399. As an impact it is known to affect availability. The summary by CVE is:

sshd in OpenSSH before 4.4, when using the version 1 SSH protocol, allows remote attackers to cause a denial of service (CPU consumption) via an SSH packet that contains duplicate blocks, which is not properly handled by the CRC compensation attack detector.

The bug was discovered 09/25/2006. The weakness was presented 03/17/2009 by Tavis Ormandy with 0-day (Website). It is possible to read the advisory at hypersonic.bluecoat.com. This vulnerability is known as CVE-2006-4924 since 09/21/2006. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are unknown but a public exploit is available.

After before and not just, there has been an exploit disclosed. It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 22468 (Slackware 10.0 / 10.1 / 10.2 / 8.1 / 9.0 / 9.1 / current : openssh (SSA:2006-272-02)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Slackware Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 185038 (HP-UX Secure Shell Remote Unauthorized Denial of Service Vulnerability (HPSBUX02178)).

The best possible mitigation is suggested to be disabling the affected component. A possible mitigation has been published before and not just after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 9056.

The vulnerability is also documented in the databases at X-Force (29158), Exploit-DB (2444), Tenable (22468), SecurityFocus (BID 20216†) and OSVDB (29152†). See VDB-1999 and VDB-3113 for similar entries. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.9
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 22468
Nessus Name: Slackware 10.0 / 10.1 / 10.2 / 8.1 / 9.0 / 9.1 / current : openssh (SSA:2006-272-02)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 57483
OpenVAS Name: Debian Security Advisory DSA 1189-1 (openssh-krb5)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Disable
Status: 🔍

0-Day Time: 🔍
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

Fortigate IPS: 🔍

Timelineinfo

09/21/2006 🔍
09/25/2006 +4 days 🔍
09/25/2006 +0 days 🔍
09/26/2006 +0 days 🔍
09/26/2006 +0 days 🔍
09/26/2006 +0 days 🔍
09/26/2006 +0 days 🔍
09/26/2006 +0 days 🔍
09/29/2006 +2 days 🔍
10/03/2006 +4 days 🔍
10/04/2006 +1 days 🔍
03/17/2009 +895 days 🔍
03/17/2009 +0 days 🔍
03/19/2009 +2 days 🔍
04/09/2025 +5865 days 🔍

Sourcesinfo

Advisory: hypersonic.bluecoat.com
Researcher: Tavis Ormandy
Organization: 0-day
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2006-4924 (🔍)
GCVE (CVE): GCVE-0-2006-4924
GCVE (VulDB): GCVE-100-3943

OVAL: 🔍
IAVM: 🔍

CERT: 🔍
X-Force: 29158 - OpenSSH identical block denial of service, Medium Risk
SecurityFocus: 20216 - OpenSSH Duplicated Block Remote Denial of Service Vulnerability
Secunia: 34274 - Blue Coat ProxySG SSH Server Denial of Service Vulnerability, Moderately Critical
OSVDB: 29152 - OpenSSH Identical Block Packet DoS
SecurityTracker: 1016931
Vulnerability Center: 12824 - OpenSSH sshd Remote Denial of Service When Using Version 1 SSH Protocol, Medium
Vupen: ADV-2009-0740

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 03/19/2009 10:54
Updated: 04/09/2025 04:26
Changes: 03/19/2009 10:54 (112), 07/08/2019 23:22 (2), 01/14/2025 16:49 (17), 04/07/2025 05:57 (7), 04/09/2025 04:26 (1)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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