SpamAssassin Long Message Header Denial of Service

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/” 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.

Update to version 3.1.0.
Original advisory

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