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Home >> Browse Vulnerability Assessment Database >> Debian Local Security Checks >> [DSA163] DSA-163-1 mhonarc

Vulnerability Assessment Details

[DSA163] DSA-163-1 mhonarc

Vulnerability Assessment Summary
DSA-163-1 mhonarc

Detailed Explanation for this Vulnerability Assessment

Jason Molenda and Hiromitsu Takagi
ways to exploit cross site
scripting bugs in mhonarc, a mail to HTML converter. When processing
maliciously crafted mails of type text/html mhonarc does not
deactivate all scripting parts properly. This is fixed in upstream
version 2.5.3.
If you are worried about security, it is recommended that you disable
support of text/html messages in your mail archives. There is no
guarantee that the library is robust enough to eliminate
all possible exploits that can occur with HTML data.
To exclude HTML data, you can use the MIMEEXCS resource. For example:


The type "text/x-html" is probably not used any more, but is good to
include it, just-in-case.
If you are concerned that this could block out the entire contents of
some messages, then you could do the following instead:


This treats the HTML as text/plain.
The above problems have been fixed in version 2.5.2-1.1 for the
current stable distribution (woody), in version 2.4.4-1.1 for
the old stable distribution (potato) and in version 2.5.11-1 for the
unstable distribution (sid).
We recommend that you upgrade your mhonarc packages.

Solution :
Network Security Threat Level: High

Networks Security ID: 4546

Vulnerability Assessment Copyright: This script is (C) 2005 Michel Arboi

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