CVE-2008-0666

Website META Language (WML) 2.0.11 allows local users to overwrite arbitrary files via a symlink attack on (1) the /tmp/pe.tmp.$$ temporary file used by wml_contrib/wmg.cgi and (2) temporary files used by wml_backend/p3_eperl/eperl_sys.c.

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://bugs.debian.org/cgi-bin/bugreport.cgi?bug=463907
• http://secunia.com/advisories/28829
• http://secunia.com/advisories/28856
• http://secunia.com/advisories/29353
• http://security.gentoo.org/glsa/glsa-200803-23.xml
• http://www.debian.org/security/2008/dsa-1492
• http://www.mandriva.com/security/advisories?name=MDVSA-2008:076
• http://www.securityfocus.com/bid/27685