IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) 9.7, 10.1, 10.5, and 11.1 could allow a local user to obtain root access by exploiting a symbolic link attack to read/write/corrupt a file that they originally did not have permission to access. IBM X-Force ID: 148804.
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 |
|---|---|---|---|
| Db2 | Ibm | 9.7 (including) | 9.7 (including) |
| Db2 | Ibm | 10.1 (including) | 10.1 (including) |
| Db2 | Ibm | 10.5 (including) | 10.5 (including) |
| Db2 | Ibm | 11.1 (including) | 11.1 (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://www.ibm.com/support/docview.wss?uid=ibm10733939
- http://www.securityfocus.com/bid/105885
- http://www.securitytracker.com/id/1042086
- https://exchange.xforce.ibmcloud.com/vulnerabilities/148804
- http://www.ibm.com/support/docview.wss?uid=ibm10733939
- http://www.securityfocus.com/bid/105885
- http://www.securitytracker.com/id/1042086
- https://exchange.xforce.ibmcloud.com/vulnerabilities/148804