The SPICE Firefox plug-in (spice-xpi) 2.4, 2.3, 2.2, and possibly other versions allows local users to overwrite arbitrary files via a symlink attack on the usbrdrctl log file, which has a predictable name.
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 |
|---|---|---|---|
| Spice-xpi | Redhat | 2.2 (including) | 2.2 (including) |
| Spice-xpi | Redhat | 2.3 (including) | 2.3 (including) |
| Spice-xpi | Redhat | 2.4 (including) | 2.4 (including) |
| Red Hat Enterprise Linux 6 | RedHat | spice-xpi-0:2.4-1.el6_0.2 | * |
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://www.redhat.com/support/errata/RHSA-2011-0426.html
- http://www.securityfocus.com/bid/47269
- http://www.securitytracker.com/id?1025304
- http://www.vupen.com/english/advisories/2011/0899
- https://bugzilla.redhat.com/show_bug.cgi?id=639869
- http://www.redhat.com/support/errata/RHSA-2011-0426.html
- http://www.securityfocus.com/bid/47269
- http://www.securitytracker.com/id?1025304
- http://www.vupen.com/english/advisories/2011/0899
- https://bugzilla.redhat.com/show_bug.cgi?id=639869