RHEL OpenSSH backdoor
| rhel-openssh-backdoor (44747) |  Medium Risk |
Description:
The OpenSSH package installed on Red Hat Enterprise Linux (RHEL), signed in August 2008 using a legitimate Red Hat GPG key and available from unofficial distribution points, could contain an externally introduced backdoor. Once installed, these modifications could be used to launch further attacks against the affected system.
*CVSS:
| Base Score: | 4.3 |
| Access Vector: | Network |
| Access Complexity: | Medium |
| Authentication: | None |
| Confidentiality Impact: | None |
| Integrity Impact: | Partial |
| Availability Impact: | None |
| Temporal Score: | 3.2 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Other
Remedy:
Apply the appropriate patch for your system. See References.
References:
- fedora-announce-list Mailing List, Fri, 22 Aug 2008 08:00:02 -0400: Infrastructure report, 2008-08-22 UTC 1200.
- OpenSSH Web site: OpenSSH.
- Red Hat Security Updates, 22nd August 2008 : OpenSSH blacklist script.
- White Wolf Security #080826-1: Kyocera Mita Scanner File Utility (Multiple).
- BID-30794: Red Hat OpenSSH Backdoor Vulnerability
- CVE-2008-3844: Certain Red Hat Enterprise Linux (RHEL) 4 and 5 packages for OpenSSH, as signed in August 2008 using a legitimate Red Hat GPG key, contain an externally introduced modification (Trojan Horse) that allows the package authors to have an unknown impact. NOTE: since the malicious packages were not distributed from any official Red Hat sources, the scope of this issue is restricted to users who may have obtained these packages through unofficial distribution points. As of 20080827, no unofficial distributions of this software are known.
- RHSA-2008-0855: Critical: openssh security update
- SA32241: Avaya Products Red Hat Tampered OpenSSH Packages
- SECTRACK ID: 1020730: OpenSSH for Red Hat Enterprise Linux Packages May Have Been Compromised
- VUPEN/ADV-2008-2821: Avaya Products OpenSSH Cookie Handling Weakness
Platforms Affected:
- OpenBSD OpenSSH
- RedHat Enterprise Linux 4 ES
- RedHat Enterprise Linux 4 Desktop
- RedHat Enterprise Linux 4 WS
- RedHat Enterprise Linux 4 AS
- RedHat Enterprise Linux 4.5.z AS
- RedHat Enterprise Linux 4.5.z ES
- RedHat Enterprise Linux 5
- RedHat Enterprise Linux 5 Client
Reported:
Aug 22, 2008
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For corrections or additions please email xforce@iss.net
* According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.