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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2008.0453 -- [Win] Akamai Download Manager Arbitrary Program Execution Vulnerability 2 May 2008 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Akamai Download Manager prior to 2.2.3.5 Publisher: iDEFENSE Operating System: Windows Impact: Execute Arbitrary Code/Commands Access: Remote/Unauthenticated CVE Names: CVE-2008-6339 Original Bulletin: http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=695 Comment: This ActiveX control may be installed on computers which have previously downloaded software from several third party vendors who use Akamai's download manager. These include Microsoft (Vista beta downloads) and Adobe (certain Adobe Acrobat, After Effects and Creative Suite 3 Design and Web product downloads). If a computer has the vulnerable ActiveX control installed, a remote attacker may compromise the computer if the user visits a malicious web page. - --------------------------BEGIN INCLUDED TEXT-------------------- iDefense Security Advisory 04.30.08 http://labs.idefense.com/intelligence/vulnerabilities/ Apr 30, 2008 I. BACKGROUND Akamai Download Manager is an integral component of Akamai's global distribution service. It is used to deliver big files quickly and reliably to users around world. It has been used by vendors such as Symantec and Microsoft to provide downloads to the public. Akamai provides both an ActiveX and a Java based Download Manager. If a user uses the ActiveX control once, it will remain installed on the users computer until manually removed. For more information, please visit following web sites. http://www.akamai.com/html/technology/products/http_downloads.html http://www.akamai.com/html/solutions/electronic_software_delivery.html II. DESCRIPTION Remote exploitation of a design error in Akamai Technologies, Inc's Download Manager allows attackers to execute arbitrary code in the context of the current user. The ActiveX control version has the following identifiers: Class: DownloadManager Control CLSID: 2AF5BD25-90C5-4EEC-88C5-B44DC2905D8B CLSID: FFBB3F3B-0A5A-4106-BE53-DFE1E2340CB1 ProgId: MANAGER.DLMCtrl.1. File: C:\Windows\Downloaded Program Files\DownloadManagerV2.ocx The Java version has the following identifiers: Class: com.akamai.dm.ui.applet.DMApplet.class JAR: dlm-java-2.2.2.0.jar This problem specifically exists due to two undocumented object parameters. By using these parameters, it is possible to cause Download Manager to automatically download and execute arbitrary binaries from attacker controlled locations. III. ANALYSIS Exploitation allows an attacker to execute arbitrary code in the context of the user viewing a maliciously crafted web page. In order to exploit this vulnerability, an attacker would need to persuade, or otherwise force, a user to view a malicious web page. This is usually accomplished by getting the targeted user to click a link in a form of electronic communication such as e-mail or instant messaging. While the attack is happening, the Download Manager user interface is displayed. However, in a normal attack scenario there is insufficient time to cancel the download before exploitation occurs. IV. DETECTION iDefense confirmed the existence of this vulnerability using version 2.2.2.1 of Akamai Technologies Inc's DownloadManagerV2.ocx. Additionally, iDefense confirmed the problem exists in version 2.2.2.0 of the Download Manager Java Applet. All versions prior to the fixed version are suspected to be vulnerable. V. WORKAROUND Setting kill-bits for the associated CLSIDs will prevent the ActiveX control from being loaded within Internet Explorer, thereby preventing exploitation. Disabling Java will prevent exploitation using the Java Applet version. VI. VENDOR RESPONSE Akamai has addressed this vulnerability with the release of version 2.2.3.5 of their Download Manager product. For more information, refer to their advisory. To download the updated version, visit the following URL. http://dlm.tools.akamai.com/tools/upgrade.html VII. CVE INFORMATION The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2008-6339 to this issue. This is a candidate for inclusion in the CVE list (http://cve.mitre.org/), which standardizes names for security problems. VIII. DISCLOSURE TIMELINE 12/06/2007 Initial vendor notification 12/06/2007 Initial vendor response 04/30/2008 Public disclosure IX. CREDIT This vulnerability was reported to iDefense by Peter Vreugdenhil. Get paid for vulnerability research http://labs.idefense.com/methodology/vulnerability/vcp.php Free tools, research and upcoming events http://labs.idefense.com/ X. LEGAL NOTICES Copyright © 2008 iDefense, Inc. Permission is granted for the redistribution of this alert electronically. It may not be edited in any way without the express written consent of iDefense. If you wish to reprint the whole or any part of this alert in any other medium other than electronically, please e-mail customerservice@idefense.com for permission. Disclaimer: The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 If you believe that your computer system has been compromised or attacked in any way, we encourage you to let us know by completing the secure National IT Incident Reporting Form at: http://www.auscert.org.au/render.html?it=3192 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQCVAwUBSBpKmCh9+71yA2DNAQLLiAP/fxMxfBQxv8o2FnJEy9L3n36iMrdBpVqf gRYzepD2GFPg15DCFDzcbbZwgt0tY63xYamTaKvQDiiCzOOn/F8qt+qbVfvhuWNc LawvVeT2MQFNmVyNVdsd1aSRu90M3kTaSTFlxKAUgDXNtqf/ors+/prqAIvGssWN AtE7CjW/JbA= =cYaJ -----END PGP SIGNATURE-----