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Secunia Research: eScan Products Agent Service Command Decryption Buffer Overflow

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                     Secunia Research 23/05/2007

 - eScan Products Agent Service Command Decryption 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 

* eScan 9.0.715.1

NOTE: Other versions may also be affected.

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2) Severity 

Rating: Moderately critical
Impact: System compromise
        Denial of Service
Where:  Local network

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3) Vendor's Description of Software 

"eScan is the latest offering from MicroWorld Technologies Inc. It
offers a combination of features to help you fight the threat of
viruses, set security policies for parental control over content
accessed by your child. It guards against Internet misuse, block Spam
and offensive mails and block PopUp Ads.".

Product Link:
http://www.mwti.net/products/escan/escan.asp

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4) Description of Vulnerability

Secunia Research has discovered a vulnerability in various eScan
products, which may be exploited by malicious people to compromise a
vulnerable system.

The vulnerability is caused due to a boundary error in the MicroWorld
Agent service (MWAGENT.EXE) when decrypting received commands. This can
be exploited to cause a stack-based buffer overflow via an overly long
command sent to the service (default port 2222/tcp).

Successful exploitation may allow execution of arbitrary code with
SYSTEM privileges.

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5) Solution 

Update to version 9.0.718.1 or later.

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6) Time Table 

10/05/2007 - Vendor notified.
10/05/2007 - Vendor response.
16/05/2007 - Vendor provides fixed version.
23/05/2007 - Public disclosure.

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7) Credits 

Discovered by Carsten Eiram, Secunia Research.

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8) References

The Common Vulnerabilities and Exposures (CVE) project has assigned 
CVE-2007-2687 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/2007-54/

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

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