r0t has discovered two vulnerabilities in ActiveCampaign KnowledgeBuilder, which can be exploited by malicious people to cause a DoS (Denial of Service) and conduct SQL injection attacks.
1) Input passed to the "article" parameter in "index.php" isn't properly sanitised before being used in a SQL query. This can be exploited to manipulate SQL queries by injecting arbitrary SQL code.
Successful exploitation requires that "magic_quotes_gpc" is disabled.
2) Input passed to the "category" parameter in "index.php" isn't properly verified, before it is used when sending requests to the database. This can be exploited to cause a large amount of SQL queries to be sent to the database via an invalid "category" parameter.
Successful exploitation causes a vulnerable system to consume a large amount of CPU resources.
The vulnerabilities have been confirmed in the latest available version. Other versions may also be affected.
Solution: Update to version 2.50.
Provided and/or discovered by: r0t
Original Advisory: http://pridels.blogspot.com/2005/11/activecampaign-knowledgebuilder-vuln.html
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Subject: ActiveCampaign KnowledgeBuilder SQL Injection and Denial of Service
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