Secunia Security Advisory – A vulnerability has been reported in SpamAssassin, which can be exploited by malicious people to cause a DoS (Denial of Service). The vulnerability is caused due to the use of an inefficient regular expression in /SpamAssassin/Message.pm to parse email headers. This can cause perl to crash when it runs out of stack space and can be exploited via a malicious email that contains a large number of recipients. The vulnerability has been reported in version 3.0.4. Prior versions may also be affected.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/41448/sa17386.txt
Source: https://packetstormsecurity.com/files/41448/Secunia-Security-Advisory-17386.html