rm_mlcache_file in bos.rte.install in AIX 5.1.0 through 5.3.0 allows local users to overwrite arbitrary files via a symlink attack on temporary files.
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 |
|---|---|---|---|
| Aix | Ibm | 5.1 (including) | 5.1 (including) |
| Aix | Ibm | 5.1l (including) | 5.1l (including) |
| Aix | Ibm | 5.2 (including) | 5.2 (including) |
| Aix | Ibm | 5.2.0.50 (including) | 5.2.0.50 (including) |
| Aix | Ibm | 5.2.0.54 (including) | 5.2.0.54 (including) |
| Aix | Ibm | 5.2.2 (including) | 5.2.2 (including) |
| Aix | Ibm | 5.2_l (including) | 5.2_l (including) |
| Aix | Ibm | 5.3 (including) | 5.3 (including) |
| Aix | Ibm | 5.3.0 (including) | 5.3.0 (including) |
| Aix | Ibm | 5.3.0.10 (including) | 5.3.0.10 (including) |
| Aix | Ibm | 5.3.0.20 (including) | 5.3.0.20 (including) |
| Aix | Ibm | 5.3_l (including) | 5.3_l (including) |
| Aix | Ibm | 5.3_ml03 (including) | 5.3_ml03 (including) |
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/19656
- http://securitytracker.com/id?1015952
- http://www-1.ibm.com/support/docview.wss?uid=isg1IY82357
- http://www.nsfocus.com/english/homepage/research/0603.htm
- http://www.osvdb.org/24706
- http://www.securityfocus.com/archive/1/431846/100/0/threaded
- http://www.securityfocus.com/archive/1/431848/100/0/threaded
- http://www.securityfocus.com/bid/17576
- http://www.vupen.com/english/advisories/2006/1389
- https://exchange.xforce.ibmcloud.com/vulnerabilities/25848
- http://secunia.com/advisories/19656
- http://securitytracker.com/id?1015952
- http://www-1.ibm.com/support/docview.wss?uid=isg1IY82357
- http://www.nsfocus.com/english/homepage/research/0603.htm
- http://www.osvdb.org/24706
- http://www.securityfocus.com/archive/1/431846/100/0/threaded
- http://www.securityfocus.com/archive/1/431848/100/0/threaded
- http://www.securityfocus.com/bid/17576
- http://www.vupen.com/english/advisories/2006/1389
- https://exchange.xforce.ibmcloud.com/vulnerabilities/25848