uulib/uunconc.c in UUDeview 0.5.20, as used in nzbget before 0.3.0 and possibly other products, allows local users to overwrite arbitrary files via a symlink attack on a temporary filename generated by the tempnam function. NOTE: this may be a CVE-2004-2265 regression.
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 |
|---|---|---|---|
| Nzbget | Nzbget | * | 0.2.2 (including) |
| Nzbget | Nzbget | 0.1.0a (including) | 0.1.0a (including) |
| Nzbget | Nzbget | 0.1.1 (including) | 0.1.1 (including) |
| Nzbget | Nzbget | 0.1.2 (including) | 0.1.2 (including) |
| Nzbget | Nzbget | 0.2.0 (including) | 0.2.0 (including) |
| Nzbget | Nzbget | 0.2.1 (including) | 0.2.1 (including) |
| Uudeview | Uudeview | 0.5.20 (including) | 0.5.20 (including) |
| Uudeview | Ubuntu | dapper | * |
| Uudeview | Ubuntu | feisty | * |
| Uudeview | Ubuntu | gutsy | * |
| Uudeview | Ubuntu | hardy | * |
| Uudeview | Ubuntu | upstream | * |
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://bugs.debian.org/cgi-bin/bugreport.cgi?bug=480972
- http://secunia.com/advisories/30171
- http://secunia.com/advisories/31420
- http://security.gentoo.org/glsa/glsa-200808-11.xml
- http://www.openwall.com/lists/oss-security/2008/05/14/10
- http://www.openwall.com/lists/oss-security/2008/05/30/1
- http://www.securityfocus.com/bid/29211
- https://exchange.xforce.ibmcloud.com/vulnerabilities/42407
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=480972
- http://secunia.com/advisories/30171
- http://secunia.com/advisories/31420
- http://security.gentoo.org/glsa/glsa-200808-11.xml
- http://www.openwall.com/lists/oss-security/2008/05/14/10
- http://www.openwall.com/lists/oss-security/2008/05/30/1
- http://www.securityfocus.com/bid/29211
- https://exchange.xforce.ibmcloud.com/vulnerabilities/42407