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Marshal MailMarshal TAR Unpacking Vulnerability
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SUMMARY
During a security audit it was discovered that a serios vulnerability in
MailMarshal (an E-Mail Security Gateway) exits when it unpacks TAR
archives.
DETAILS
Vulnerable Systems:
* MailMarshal version 6.2.1.3253 and prior
MailMarshal uses an old version of GNU tar (1.11.8 + 1.5win32). Sending a
special crafted TAR file it is possible to traverse through directories
and even drives. Thus files can be spread onto the system and existing
files can be overwritten depending on the privileges of running
MailMarshal processes (default: System privileges) This can lead to a
complete system compromise.
Solution
Install vendor patch. The vendor has released a patch at:
<http://marshal.com/kb/article.aspx?id=11780>
http://marshal.com/kb/article.aspx?id=11780
History
* 2007-08-24 Bug discovered
* 2007-08-27 Vendor informed
* 2007-08-30 Vendor released advisory and patches
* 2007-09-04 rt-solutions.de released security advisory
ADDITIONAL INFORMATION
The information has been provided by <mailto:discuss@rt-solutions.de> S.
Vandersee.
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