Secunia Research has discovered two vulnerabilities in K9 Web Protection, which can be exploited by malicious people to compromise a user's system. The vulnerabilities are caused by boundary errors in the filter service (k9filter.exe) when handling HTTP version information in responses from a centralized server (sp.cwfservice.net). These can be exploited to cause stack-based buffer overflows via a specially crafted response containing overly long HTTP version information. Successful exploitation allows execution of arbitrary code, but requires that requests to the centralized server can be redirected to a malicious service or otherwise intercepted. Affected is Blue Coat K9 Web Protection 3.2.44 with Filter version 3.2.32.
7d24d804fee0df27fd0ed5b35e4f7879de54c951e7cbd66c17b20b056f824647Secunia Research has discovered a vulnerability in K9 Web Protection, which can be exploited by malicious people to compromise a user's system. The vulnerability is caused by a boundary error in the filter service (k9filter.exe) during processing of "Referer" headers when the web-based K9 Web Protection Administration interface is accessed. This can be exploited to cause a stack-based buffer overflow via an overly long "Referer:" header. Successful exploitation allows execution of arbitrary code when a user e.g. visits a malicious web site. Affected is Blue Coat K9 Web Protection 3.2.44 with Filter version 3.2.32.
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