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Secunia Research: Lotus Notes htmsr.dll Buffer Overflows



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                     Secunia Research 08/04/2008

              - Lotus Notes htmsr.dll Buffer Overflows -

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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 7.0.2 and 7.0.3

NOTE: Other versions may also be affected.

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2) Severity 

Rating: Highly critical
Impact: System compromise
Where:  Remote

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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 Lotus Notes,
which can be exploited by malicious people to compromise a user's
system.

1) A boundary error within the HTML speed reader (htmsr.dll) when
handling links in e.g. the "background" attribute of <BODY> tags can 
be exploited to cause a stack-based buffer overflow.

2) A boundary error within the HTML speed reader (htmsr.dll) when
handling e.g. the "src" attribute of <IMG> tags can be exploited to
cause a stack-based buffer overflow.

3) A boundary error within the HTML speed reader (htmsr.dll) when
handling large chunks of data inside an HTML document can be exploited
to cause a heap-based buffer overflow.

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5) Solution 

Apply patch available from the vendor.

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6) Time Table 

07/01/2008 - Vendor notified.
07/01/2008 - Vendor response.
08/04/2008 - 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-2008-0066 for the vulnerabilities.

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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
database as a service to the security community and private 
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
do active vulnerability research in order to aid improving the 
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
to see currently vacant positions:

http://secunia.com/secunia_vacancies/

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/2008-3/

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

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