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                     Secunia Research 08/04/2008

       - Lotus Notes Applix Graphics Parsing Vulnerabilities -

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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 

* Lotus Notes 7.0.3 and 8.0

NOTE: Other versions may also be affected.

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2) Severity 

Rating: Highly critical
Impact: From remote
Where:  System access

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3) Vendor's Description of Software 

"Security-rich software that enables businesses to communicate,
collaborate and increase productivity."

Product Link:
http://www-306.ibm.com/software/lotus/

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4) Description of Vulnerability

Secunia Research has discovered some vulnerabilities in Autonomy
Keyview utilised in Lotus Notes, which can be exploited by malicious
people to compromise a vulnerable system when viewing Applix
documents.

1) An unsafe call to "sscanf()" when parsing the "ENCODING" attribute
of the "*BEGIN" tag can be exploited to cause a stack-based buffer
overflow.

2) A boundary error when parsing overly long tokens from the input
file can be exploited to cause a heap-based buffer overflow.
 
3) A boundary error when parsing the initial "*BEGIN" tag can be
exploited to cause stack-based buffer overflow.
  
Successful exploitation of the above vulnerabilities allows execution
of arbitrary code.
 
4) A logic error when parsing long tokens can result in an infinite
loop.  Exploitation will result in maximum CPU usage until an
application-configured timeout expires. In some cases memory usage
will increase until the OS terminates the process.

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5) Solution 

The vendor has issued a patch.

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6) Time Table 

21/11/2007 - Autonomy, IBM and other vendors notified.
21/11/2007 - Autonomy respond.
21/11/2007 - IBM respond.
11/03/2008 - Symantec release p189 of SMSSMTP 5.0.1 containing fix.
14/03/2008 - Notify IBM that fixed versions have been published.
14/03/2008 - Confirmation from IBM that they are developing fixes.
08/04/2008 - Public disclosure.

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7) Credits 

Discovered by Dyon Balding, Secunia Research.

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8) References

The Common Vulnerabilities and Exposures (CVE) project has assigned 
CVE-2007-5405 for the overflows and CVE-2007-5406 for the infinite
loop.

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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.

http://secunia.com/

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

http://corporate.secunia.com/secunia_research/33/

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:

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10) Verification 

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2007-96/

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

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