ID: 3438
Date: 22/10/2007
Title: 3438 - RealPlayer playlist name stack buffer overflow
Platform level affected:Net Application - Client
Hardware components affected:Intel PC
Specific operating systems components affected: 32-bit Windows
Net-enabled software: Other
Other software: Other
Remediation Summary:Update your copy of the software with the download available from the supplier.
Vendors affected:RealPlayer
Applications affected:RealPlayer
Adversity source: Unknown
Attack Vector: Vulnerability exploitation
Virulence: Unknown
Warning Status: Active
Potential Damage: Remote execution/modification
Possible Duration: Open Ended
Availability of fix: Available
Type of fix: Patch
Source: AusCERT & US-CERT
Reliability of source: Trusted
Source URL: http://www.kb.cert.org/vuls/id/871673
CVE: CVE-2007-5601
Abstract: RealPlayer contains a stack buffer overflow in the handling of playlist names, which can allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.
Vulnerability Note VU#871673
RealPlayer playlist name stack buffer overflow
Overview
RealPlayer contains a stack buffer overflow in the handling of playlist names, which can allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.
I. Description
RealNetworks RealPlayer is a multimedia application that allows users to view local and remote audio/video content. The RealPlayer Database Component, which is provided by MPAMedia.dll, contains a stack buffer overflow in the handling of playlist names. The RealPlayer IERPCtl ActiveX control, which is provided by ierpplug.dll, can be used to import a local file into a specified playlist in RealPlayer. This can be used to trigger the buffer overflow vulnerability.
The ActiveX control is present in RealPlayer version 9 (RealOne Player) and later.
II. Impact
By convincing a user to view a specially crafted HTML document (e.g., a web page or an HTML email message or attachment), a remote, unauthenticated attacker may be able to execute arbitrary code with the privileges of the user on a vulnerable system.
III. Solution
Apply an update
Please see the Security Update from RealNetworks. The update will provide newer versions of the RealPlayer Database Component for RealPlayer 10.5 and RealPlayer 11 beta. Users with RealOne Player, RealOne Player v2 or RealPlayer 10 should first update to RealPlayer 10.5 or later and then apply the security update.
Disable the IERPCtl ActiveX control in Internet Explorer
The ActiveX control that can be used as an attack vector can be disabled in Internet Explorer by setting the kill bit for the following CLSID:
{FDC7A535-4070-4B92-A0EA-D9994BCC0DC5}
More information about how to set the kill bit is available in Microsoft Support Document 240797. Alternatively, the following text can be saved as a .REG file and imported to set the kill bit for this control:
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\{FDC7A535-4070-4B92-A0EA-D9994BCC0DC5}]
"Compatibility Flags"=dword:00000400
Disable ActiveX
Disabling ActiveX controls in the Internet Zone (or any zone used by an
attacker) appears to prevent exploitation of this and other ActiveX vulnerabilities. Instructions for disabling ActiveX in the Internet Zone can be found in the "Securing Your Web Browser" document.
Systems Affected
Vendor Status Date Updated
RealNetworks, Inc. Vulnerable 20-Oct-2007
References
http://www.cert.org/tech_tips/securing_browser/#Internet_Explorer
http://service.real.com/realplayer/security/191007_player/en/
http://www.securityfocus.com/bid/26130
http://www.symantec.com/enterprise/security_response/weblog/2007/10/realplayer_exploit_on_the_loos.html
http://support.microsoft.com/kb/240797
Credit
This vulnerability was analyzed and confirmed by US-CERT on October 13, 2007.
This document was written by Will Dormann.
Other Information
Date Public 10/18/2007
Date First Published 10/20/2007 10:25:17 AM
Date Last Updated 10/21/2007
CERT Advisory
CVE Name CVE-2007-5601
Metric 34.02
Document Revision 19
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Mon, 22 Oct 2007 00:00:00 GMT
Domain affected: Technical