cman fence_egenera symlink
| cman-fenceegenera-symlink (44845) |  Medium Risk |
Description:
cman could allow a local attacker to launch a symlink attack. The fence_egenera script creates temporary files insecurely. A local attacker could exploit this vulnerability by creating a symbolic link from a temporary file to other files on the system, which would allow the attacker to overwrite arbitrary files on the system with elevated privileges.
*CVSS:
| Base Score: | 3.3 |
| Access Vector: | Local |
| Access Complexity: | Medium |
| Authentication: | None |
| Confidentiality Impact: | None |
| Integrity Impact: | Partial |
| Availability Impact: | Partial |
| Temporal Score: | 3.1 |
| Exploitability: | High |
| Remediation Level: | Unavailable |
| Report Confidence: | Uncorroborated |
Consequences:
File Manipulation
Remedy:
Apply the appropriate patch for your system. See References.
References:
- cman Web page: Package: cman (1.03.00-2) .
- Debian Bug report logs - #496410: The possibility of attack with the help of symlinks in some Debian packages.
- Dmitry E. Oboukhov Advisory: Package: cman .
- BID-30898: cman 'fence_egenera' Insecure Temporary File Creation Vulnerability
- CVE-2008-4192: The pserver_shutdown function in fence_egenera in cman 2.20080629 and 2.20080801 allows local users to overwrite arbitrary files via a symlink attack on the /tmp/eglog temporary file.
- SA31887: Cluster Project CMAN "fence_egenera" Insecure Temporary Files
- USN-875-1: Red Hat Cluster Suite vulnerabilities
Platforms Affected:
- Canonical Ubuntu 6.06 LTS
- Canonical Ubuntu 8.04 LTS
- Canonical Ubuntu 8.10
- Debain CMAN 2.03.07
Reported:
Aug 24, 2008
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 the author/distributor (IBM Internet Security Systems X-Force) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.
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.