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                     Secunia Research 09/11/2007

 - Miranda "ext_yahoo_contact_added()" Format String Vulnerability -

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Table of Contents

Affected Software....................................................1
Severity.............................................................2
Vendor's Description of Software.....................................3
Description of Vulnerability.........................................4
Solution.............................................................5
Time Table...........................................................6
Credits..............................................................7
References...........................................................8
About Secunia........................................................9
Verification........................................................10

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1) Affected Software 

* Miranda IM version 0.7.1.

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2) Severity 

Rating: Less critical
Impact: System access
Where:  Remote

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3) Vendor's Description of Software 

"Miranda IM is an open-source multi protocol instant messenger client 
for Microsoft Windows. It's smaller, faster, easier!".

Product Link:
http://www.miranda-im.org/

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4) Description of Vulnerabilities

Secunia Research has discovered a vulnerability in Miranda IM, which 
can be exploited by malicious people to compromise a vulnerable system.

The vulnerability is caused due to a format string error within 
"ext_yahoo_contact_added()" in yahoo.c and can be exploited via a 
"Y7 Buddy Authorization" packet containing format string specifiers.

Successful exploitation allows execution of arbitrary code, but
requires that the user e.g. is tricked into connecting to a malicious
server.

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5) Solution 

Fixed in the SVN repository.

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6) Time Table 

26/10/2007 - Vendor notified.
31/10/2007 - vendor replied.
09/11/2007 - Public disclosure.

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7) Credits 

Discovered by Secunia Research.

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8) References

The Common Vulnerabilities and Exposures (CVE) project has assigned
CVE-2007-5396 for the vulnerability.

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9) About Secunia

Secunia offers vulnerability management solutions to corporate
customers with verified and reliable vulnerability intelligence
relevant to their specific system configuration:

http://corporate.secunia.com/

Secunia also provides a publicly accessible and comprehensive advisory
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individuals, who are interested in or concerned about IT-security.

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Secunia believes that it is important to support the community and to
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security and reliability of software in general:

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Secunia regularly hires new skilled team members. Check the URL below
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Secunia offers a FREE mailing list called Secunia Security Advisories:

http://secunia.com/secunia_security_advisories/ 

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10) Verification 

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2007-89/

Complete list of vulnerability reports published by Secunia Research:
http://secunia.com/secunia_research/

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