CVE-2007-6595

ClamAV 0.92 allows local users to overwrite arbitrary files via a symlink attack on (1) temporary files used by the cli_gentempfd function in libclamav/others.c or on (2) .ascii files used by sigtool, when utf16-decode is enabled.

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://kolab.org/security/kolab-vendor-notice-19.txt
• http://lists.opensuse.org/opensuse-security-announce/2008-04/msg00009.html
• http://secunia.com/advisories/28949
• http://secunia.com/advisories/29891
• http://secunia.com/advisories/31437
• http://security.gentoo.org/glsa/glsa-200808-07.xml
• http://securityreason.com/securityalert/3501
• http://securitytracker.com/id?1019148
• http://www.debian.org/security/2008/dsa-1497
• http://www.mandriva.com/security/advisories?name=MDVSA-2008:088
• http://www.securityfocus.com/archive/1/485631/100/0/threaded
• http://www.securityfocus.com/bid/27064
• http://www.vupen.com/english/advisories/2008/0606
• https://exchange.xforce.ibmcloud.com/vulnerabilities/39335
• https://exchange.xforce.ibmcloud.com/vulnerabilities/39339