Title: PHP-Nuke CRLF Injection Vulnerability
Severity: HIGH
Description:
PHP-Nuke is a web-based portal system. Implemented in PHP, it is available for a range of systems, including Unix, Linux, and Microsoft Windows.
Throughout PHP-Nuke, the PHP mail() function is implemented to handle email through web-based intefaces for various purposes (for features such as "feedback", "send this to a friend", etc). There is no input validation performed on user data passed to this function. As a result, malicious users may embed CR/LF sequences to inject additional headers into outgoing messages.
Attackers may exploit this weakness to manipulate the structure of outgoing messages. For example, it may be possible for attackers to set the recipient to an arbitrary value. This could be leveraged by individuals to send mass unsolicited mail in a manner similar to how "formmail" is actively exploited (BID 3955).
Affected Products:
- Francisco Burzi PHP-Nuke 6.0.0
- Francisco Burzi PHP-Nuke 6.5.0 BETA 1
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