Secunia Research: Helix Server SNMP Master Agent Service Two Denial of Service Vulnerabilities

[Secunia Research <remove-vuln@xxxxxxxxxxx>]

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                     Secunia Research 09/04/2012

            - RealNetworks Helix Server SNMP Master Agent -
               - Two Denial of Service 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 

* RealNetworks Helix Server version 14.2.0.212.

NOTE: Other versions may also be affected.

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2) Severity 

Rating: Less critical
Impact: Denial of Service
Where:  Local network

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3) Vendor's Description of Software 

"Helix Server Standard delivers Flash, H.264, MPEG-4 (MP4), QuickTime,
MP3 and RealVideo content to PCs at the enterprise-level, and includes
features such as Flash Dynamic Streaming, Live Broadcasting,
Server-Side Playlists, Bookmarking, and Custom Logging and Multiple
Platform OS Support."

Product Link:
http://www.realnetworks.com/helix/

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4) Description of Vulnerability

Secunia Research has discovered two vulnerabilities in RealNetworks
Helix Server, which can be exploited by malicious people to cause a
Denial of Service.

1) An error in the SNMP Master Agent process (master.exe) can be
exploited to terminate the service by establishing and immediately
closing a TCP connection on port 705.

2) An input validation error when processing the "DisplayString" of
SNMP object idenfiers can be exploited to cause an unhandled exception
and terminate the SNMP Master Agent service (master.exe) via a
specially crafted "Open-PDU" request sent to TCP port 705.

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5) Solution 

Update to version 14.3.x.

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6) Time Table 

26/07/2011 - Vendor notified.
29/07/2011 - Vendor response.
09/04/2012 - Coordinated 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 not yet
assigned a CVE identifier for the vulnerabilities.

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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/2012-9/

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

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