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                     Secunia Research 23/06/2008

       - Motion "read_client()" HTTP Request Buffer Overflow -

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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 

* Motion 3.2.10

NOTE: Other versions may also be affected.

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2) Severity 

Rating: Moderately critical
Impact: System access
Where:  Remote

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3) Vendor's Description of Software 

"Motion is a program that monitors the video signal from one or more
cameras and is able to detect if a significant part of the picture
has changed; in other words, it can detect motion".

Product Link:
http://www.lavrsen.dk/twiki/bin/view/Motion/WebHome

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4) Description of Vulnerability

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

The vulnerability is caused due to a boundary error within
the "read_client()" function in webhttpd.c. This can be exploited to
cause a stack-based buffer overflow by sending a specially crafted
request to the HTTP control interface.

Successful exploitation allows execution of arbitrary code, but 
requires that the Motion HTTP control interface is enabled.

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5) Solution 

Update to version 3.2.10.1.

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6) Time Table 

10/06/2008 - Vendor notified.
10/06/2008 - Vendor response.
23/06/2008 - Public disclosure.

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7) Credits 

Discovered by Stefan Cornelius, Secunia Research.

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8) References

The Common Vulnerabilities and Exposures (CVE) project has not 
currently assigned a CVE identifier 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
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/2008-26/

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

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