TITLE:
Bogofilter Two Denial of Service Vulnerabilities

SECUNIA ADVISORY ID:
SA18352

VERIFY ADVISORY:
http://secunia.com/advisories/18352/

CRITICAL:
Moderately critical

IMPACT:
DoS

WHERE:
>From remote

SOFTWARE:
bogofilter 0.x
http://secunia.com/product/822/

DESCRIPTION:
Some vulnerabilities have been reported in Bogofilter, which can be
exploited by malicious people to cause a DoS (Denial of Service).

1) A boundary error exists in bogofilter and bogolexer when
performing character set conversion on invalid input sequences. This
can be exploited to cause a heap-based buffer overflow and can cause
the application to crash via an email containing specially crafted
binary attachments.

Successful exploitation requires that bogofilter is used with an
unicode database.

The vulnerability has been reported in the following versions:
* bogofilter (stable) 0.96.2, 0.95.2, 0.94.14, 0.94.12
* bogofilter (current) 0.93.5 through 0.96.2

2) A boundary error exists in bogofilter and bogolexer when
processing input containing overly long words. This can be exploited
to cause a heap-based buffer overflow and crashes the application if
the input contains words whose length exceed 16,384 bytes.

The vulnerability has been reported in version 0.96.2.

SOLUTION:
Update to version 1.0.1 or later.
https://sourceforge.net/project/showfiles.php?group_id=62265

The following versions are reportedly not vulnerable:
* bogofilter 0.96.3 (current), 0.96.6, and 1.0.0.

PROVIDED AND/OR DISCOVERED BY:
The vendor credits David Relson and Clint Adams.

ORIGINAL ADVISORY:
http://bogofilter.sourceforge.net/security/bogofilter-SA-2005-01
http://bogofilter.sourceforge.net/security/bogofilter-SA-2005-02

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