SpamAssassin Bug in Processing Long Message Headers Lets Remote Users Deny Service
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SecurityTracker Alert ID: 1014219
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SecurityTracker URL: http://securitytracker.com/id?1014219
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CVE Reference: CAN-2005-1266
(Links to External Site)
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Date: Jun 16 2005
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Impact: Denial of service via network
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Fix Available: Yes
Vendor Confirmed: Yes
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Version(s): 3.0.1, 3.0.2, and 3.0.3
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Description: A vulnerability was reported in SpamAssassin. A remote user can cause denial of service conditions.
A remote user can send e-mail containing specially crafted message headers to cause SpamAssassin to take a "very long time" to check the message.
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Impact: A remote user can cause SpamAssassin to take an excessive amount of time to analyze a message.
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Solution: The vendor has released a fixed version (3.0.4), available at:
http://spamassassin.apache.org/downloads.cgi
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Vendor URL: spamassassin.apache.org/ (Links to External Site)
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Cause: Exception handling error, Input validation error
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Underlying OS: Linux (Any), UNIX (Any)
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Reported By: Daniel Quinlan <quinlan@pathname.com>
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Message History:
This archive entry has one or more follow-up message(s) listed below.
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Source Message Contents
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Date: 2005-06-15 20:00:46
From: Daniel Quinlan <quinlan@pathname.com>
Subject: Denial of Service Vulnerability in Apache SpamAssassin 3.0.1-3.0.3
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Apache SpamAssassin 3.0.4 was recently released [0], and fixes a denial
of service vulnerability in versions 3.0.1, 3.0.2, and 3.0.3. The
vulnerability allows certain misformatted long message headers to cause
spam checking to take a very long time.
While the exploit has yet to be seen in the wild, we are concerned that
there may be attempts to abuse the vulnerability in the future.
Therefore, we strongly recommend all users of these versions upgrade to
Apache SpamAssassin 3.0.4 as soon as possible.
This issue has been assigned CVE id CAN-2005-1266 [1].
To contact the Apache SpamAssassin security team, please e-mail
security at spamassassin.apache.org. For more information about Apache
SpamAssassin, visit the http://spamassassin.apache.org/ web site.
Apache SpamAssassin Security Team
[0]: http://mail-archives.apache.org/mod_mbox/spamassassin-dev/200506.mbox/%3c20050606 \
223631.GG11538@kluge.net%3e
[1]: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1266
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