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RealPlayer/RealOne "DUNZIP32.dll" Buffer Overflow Vulnerability
Secunia Advisory: SA12869
Release Date: 2004-10-27
Last Update: 2004-12-07
Popularity: 17,389 views

Critical:
Highly critical
Impact: System access
Where: From remote
Solution Status: Vendor Patch

Software:DynaZip Max 5.x
DynaZip Max Secure 6.x
RealOne Player 1.x
RealOne Player 2.x
RealPlayer 10.x

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CVE reference:CVE-2004-1094


Description:
eEye Digital Security and NGSSoftware have reported a vulnerability in RealPlayer and RealOne, which potentially can be exploited by malicious people to compromise a user's system.

The vulnerability is caused due to a boundary error in a 3rd-party compression library (DUNZIP32.dll) when processing skin files. This can be exploited to cause a buffer overflow via a specially crafted skin file.

Successful exploitation allows execution of arbitrary code.

The vulnerability affects the following versions:
* RealPlayer 10.5 (prior to build 6.0.12.1056)
* RealPlayer 10
* RealOne Player v2
* RealOne Player v1
* DynaZip (prior to version 5.00.04)
* DynaZip Max (prior to version 6.00.01)

The vulnerability is related to:
SA12805

Solution:
RealPlayer/RealOne:
Fixes are available via the "Check for Update" feature.

DynaZip:
Update to version 5.00.04 or later.

DynaZip Max:
Update to version 6.00.01 or later.

Provided and/or discovered by:
Independently discovered by:
* Yuji Ukai, eEye Digital Security.
* John Heasman, NGSSoftware.

Changelog:
2004-10-28: Added link to advisory from eEye Digital Security.
2004-11-01: Updated credits and linked to NGSSoftware advisory.
2004-11-23: Added information about affected DynaZip versions.
2004-12-07: Added CVE reference.

Original Advisory:
RealNetworks:
http://www.service.real.com/help/faq/security/041026_player/EN/

eEye Digital Security:
http://www.eeye.com/html/research/advisories/AD20041027.html

NGSSoftware:
http://www.nextgenss.com/advisories/realra3.txt

Other References:
SA12805:
http://secunia.com/advisories/12805/

US-CERT VU#582498:
http://www.kb.cert.org/vuls/id/582498


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