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fetchmail -- denial of service/crash from malicious POP3 server


In fetchmail, the the remote code injection via POP3 UIDL was fixed, but a denial of service attack was introduced:

Two possible NULL-pointer dereferences allow a malicous POP3 server to crash fetchmail by respondig with UID lines containing only the article number but no UID (in violation of RFC-1939), or a message without Message-ID when no UIDL support is available.



portaudit: fetchmail -- denial of service/crash from malicious POP3 server

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

Oliver Eikemeier <>