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 an error when processing certain malformed, overly long message headers and can be exploited to cause the spam checking to take a very long time by sending a specially crafted message to a vulnerable server.
The vulnerability has been reported in versions 3.0.1 through 3.0.3.
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Subject: SpamAssassin Message Header Processing Denial of Service
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