CVE-2012-2093

src/common/latex.py in Gajim 0.15 allows local users to overwrite arbitrary files via a symlink attack on a temporary latex file, related to the get_tmpfile_name function.

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://hg.gajim.org/gajim/rev/f046e4aaf7d4
• http://lists.fedoraproject.org/pipermail/package-announce/2012-April/079169.html
• http://lists.fedoraproject.org/pipermail/package-announce/2012-April/079237.html
• http://lists.fedoraproject.org/pipermail/package-announce/2012-April/079241.html
• http://secunia.com/advisories/48695
• http://secunia.com/advisories/48794
• http://security.gentoo.org/glsa/glsa-201208-04.xml
• http://www.openwall.com/lists/oss-security/2012/04/10/15
• http://www.openwall.com/lists/oss-security/2012/04/10/6
• http://www.securityfocus.com/bid/53017
• https://exchange.xforce.ibmcloud.com/vulnerabilities/74869
• https://trac.gajim.org/changeset/13759/src/common/latex.py