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socat -- buffer overflow with data from command line


Florian Weimer of the Red Hat Product Security Team reports:

Due to a missing check during assembly of the HTTP request line a long target server name in the PROXY-CONNECT address can cause a stack buffer overrun. Exploitation requires that the attacker is able to provide the target server name to the PROXY-CONNECT address in the command line. This can happen for example in scripts that receive data from untrusted sources.



portaudit: socat -- buffer overflow with data from command line

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If you have found a vulnerability in a FreeBSD port not listed in the database, please contact the FreeBSD Security Team. Refer to "FreeBSD Security Information" for more information.

Oliver Eikemeier <>