sealert in setroubleshoot 2.0.5 allows local users to overwrite arbitrary files via a symlink attack on the sealert.log temporary file.
Weakness
The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Enterprise_linux | Redhat | 5.0 (including) | 5.0 (including) |
| Enterprise_linux_desktop | Redhat | 5 (including) | 5 (including) |
| Red Hat Enterprise Linux 5 | RedHat | setroubleshoot-0:2.0.5-3.el5 | * |
| Red Hat Enterprise Linux 5 | RedHat | setroubleshoot-plugins-0:2.0.4-2.el5 | * |
Potential Mitigations
- Follow the principle of least privilege when assigning access rights to entities in a software system.
- Denying access to a file can prevent an attacker from replacing that file with a link to a sensitive file. Ensure good compartmentalization in the system to provide protected areas that can be trusted.
Related Attack Patterns
- https://cwe.mitre.org/data/definitions/132.html
- https://cwe.mitre.org/data/definitions/17.html
- https://cwe.mitre.org/data/definitions/35.html
- https://cwe.mitre.org/data/definitions/76.html
References
- http://secunia.com/advisories/30339
- http://securitytracker.com/id?1020077
- http://www.redhat.com/support/errata/RHSA-2008-0061.html
- http://www.securityfocus.com/bid/29320
- https://bugzilla.redhat.com/show_bug.cgi?id=288221
- https://exchange.xforce.ibmcloud.com/vulnerabilities/42591
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9705
- http://secunia.com/advisories/30339
- http://securitytracker.com/id?1020077
- http://www.redhat.com/support/errata/RHSA-2008-0061.html
- http://www.securityfocus.com/bid/29320
- https://bugzilla.redhat.com/show_bug.cgi?id=288221
- https://exchange.xforce.ibmcloud.com/vulnerabilities/42591
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9705