CVE-2012-0054

libs/updater.py in GoLismero 0.6.3, and other versions before Git revision 2b3bb43d6867, as used in backtrack and possibly other products, allows local users to overwrite arbitrary files via a symlink attack on GoLismero-controlled files, as demonstrated using Admin/changes.dat.

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

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://code.google.com/p/golismero/source/detail?r=2b3bb43d68676efd687361f7de29380189031ab8
• http://www.openwall.com/lists/oss-security/2012/01/17/10
• http://www.openwall.com/lists/oss-security/2012/01/17/7
• http://www.osvdb.org/78472