Format string vulnerability in the p_cgi_error function in python/neo_cgi.c in the Python CGI Kit (neo_cgi) module for Clearsilver 0.10.5 and earlier allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via format string specifiers that are not properly handled when creating CGI error messages using the cgi_error API function.

References

• https://nvd.nist.gov/vuln/detail/CVE-2011-4357
• https://exchange.xforce.ibmcloud.com/vulnerabilities/71599
• http://code.google.com/p/clearsilver/source/detail?r=919
• http://osvdb.org/77419
• http://secunia.com/advisories/47016
• http://tech.groups.yahoo.com/group/ClearSilver/message/1422
• http://www.debian.org/security/2011/dsa-2355
• http://www.openwall.com/lists/oss-security/2011/11/27/1