Apple Mac OS X OpenSSH denial of service
| macos-openssh-dos (32975) |  Medium Risk |
Description:
Apple Mac OS X is vulnerable to a denial of service, caused by a vulnerability in the SSH key generation process in OpenSSH. A remote attacker could connect to the server before SSH has finished making keys, which forces the keys to be recreated and breaks the trust relationship with the server, resulting in a denial of service.
*CVSS:
| Base Score: | 5 |
| Access Vector: | Remote |
| Access Complexity: | Low |
| Authentication: | Not Required |
| Confidentiality Impact: | None |
| Integrity Impact: | None |
| Availability Impact: | Complete |
| Temporal Score: | 3.7 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Denial of Service
Remedy:
Upgrade to the latest version of Mac OS X (10.4.9 or later) or apply Apple Security Update 2007-003. See References.
References:
- Apple Mac OS X Web site: Apple - Apple - Mac OS X - Leopard Sneak Peek.
- Mac OS X 10.4.9 and Security Update 2007-003: About the security content of Mac OS X 10.4.9 and Security Update 2007-003.
- OpenSSH Web page: OpenSSH.
- BID-22948: Apple Mac OS X Multiple Applications Multiple Vulnerabilities
- CVE-2007-0726: The SSH key generation process in OpenSSH in Apple Mac OS X 10.3.9 and 10.4 through 10.4.8 allows remote attackers to cause a denial of service by connecting to the server before SSH has finished creating keys, which causes the keys to be regenerated and can break trust relationships that were based on the original keys.
- OSVDB ID: 34850: OpenSSH on Mac OS X Key Generation Remote Connection DoS
- SA24479: Mac OS X Security Update Fixes Multiple Vulnerabilities
- SECTRACK ID: 1017756: Apple OpenSSH Key Generation Process Lets Remote Users Deny Service
- VUPEN/ADV-2007-0930: Apple Mac OS X Multiple Remote Code Execution and Denial of Service Vulnerabilities
Platforms Affected:
- Apple Mac OS X 10.3.9
- Apple Mac OS X 10.4
- Apple Mac OS X 10.4.1
- Apple Mac OS X 10.4.2
- Apple Mac OS X 10.4.3
- Apple Mac OS X 10.4.4
- Apple Mac OS X 10.4.5
- Apple Mac OS X 10.4.6
- Apple Mac OS X 10.4.7
- Apple Mac OS X 10.4.8
- Apple Mac OS X Server 10.3.9
- Apple Mac OS X Server 10.4
- Apple Mac OS X Server 10.4.1
- Apple Mac OS X Server 10.4.2
- Apple Mac OS X Server 10.4.3
- Apple Mac OS X Server 10.4.4
- Apple Mac OS X Server 10.4.5
- Apple Mac OS X Server 10.4.6
- Apple Mac OS X Server 10.4.7
- Apple Mac OS X Server 10.4.8
- OpenBSD OpenSSH
Reported:
Mar 13, 2007
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* 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.