CVE-2012-4455

openCryptoki 2.4.1 allows local users to create or set world-writable permissions on arbitrary files via a symlink attack on the (1) LCK..opencryptoki or (2) LCK..opencryptoki_stdll file in /var/lock/.

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://opencryptoki.git.sourceforge.net/git/gitweb.cgi?p=opencryptoki/opencryptoki%3Ba=commitdiff%3Bh=5667edb52cd27b7e512f48f823b4bcc6b872ab15
• http://secunia.com/advisories/50702
• http://sourceforge.net/mailarchive/message.php?msg_id=29191022
• http://www.openwall.com/lists/oss-security/2012/09/07/2
• http://www.openwall.com/lists/oss-security/2012/09/07/6
• http://www.openwall.com/lists/oss-security/2012/09/09/2
• http://www.openwall.com/lists/oss-security/2012/09/20/6
• http://www.openwall.com/lists/oss-security/2012/09/25/5
• http://www.openwall.com/lists/oss-security/2012/09/27/2
• http://www.securityfocus.com/bid/55627
• https://bugzilla.redhat.com/show_bug.cgi?id=730636
• https://exchange.xforce.ibmcloud.com/vulnerabilities/78943