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Mod_SSL Wildcard DNS Cross Site Scripting Vulnerability
A vulnerability has been discovered in the mod_ssl module, for Apache. It should be noted that the existance of this vulnerability is limited to configurations with both the 'UseCanonicalName' option turned off and wildcard DNS enabled. It has been reported that Apache v1.x, when using the mod_ssl module will return an unescaped server name in response to HTTP requests on SSL ports. If all of these circumstances are met, an attacker may be able to exploit this issue via a malicious link containing arbitrary HTML and script code as part of the hostname. When the malicious link is clicked by an unsuspecting user, the attacker-supplied HTML and script code will be executed by their web client. This will occur because the server will echo back the malicious hostname supplied in the client's request, without sufficiently escaping HTML and script code. Attacks of this nature may make it possible for attackers to manipulate web content or to steal cookie-based authentication credentials. It may be possible to take arbitrary actions as the victim user. |
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