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                     Secunia Research 29/10/2010

- SonicWALL SSL-VPN End-Point Interrogator/Installer ActiveX Control -
      - "Install3rdPartyComponent()" Method 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 

* SonicWALL SSL-VPN End-Point Interrogator/Installer ActiveX Control 
version 10.5.1.117

NOTE: Other versions may also be affected.

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2) Severity 

Rating: Highly critical
Impact: System access
Where:  Remote

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3) Vendor's Description of Software 

"The End-Point Interrogator/Installer ActiveX control provides 
software installation and interrogation functionality and is used by
the SonicWALL SSL-VPN E-Class remote access devices."

Product Link:
http://www.sonicwall.com/us/products/506.html

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4) Description of Vulnerability

Secunia Research has discovered a vulnerability in SonicWALL SSL-VPN
End-Point Interrogator/Installer ActiveX Control, which can be
exploited by malicious people to compromise a user's system.

The vulnerability is caused by a boundary error in the
"Install3rdPartyComponent()" method in the "Aventail.EPInstaller"
ActiveX control when creating an absolute path name based on values
in the "CabURL" and "Location" arguments. This can be exploited to
cause a stack-based buffer overflow via overly long values.

Successful exploitation allows execution of arbitrary code.

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5) Solution 

Update to version 10.5.2 and apply hotfix 3 for version 10.0.5.

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6) Time Table 

28/09/2010 - Vendor notified.
28/09/2010 - Vendor response.
10/10/2010 - Vendor confirms the vulnerability.
26/10/2010 - Vendor releases fixed version.
29/10/2010 - Public disclosure.

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7) Credits 

Discovered by Dmitriy Pletnev, Secunia Research.

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8) References

The Common Vulnerabilities and Exposures (CVE) project has assigned
CVE-2010-2583 for the vulnerability.

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9) About Secunia

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10) Verification 

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2010-117/

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

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