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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2008.0157 -- [Win] Adobe Flash Media Server 2 Memory Corruption Vulnerability 15 February 2008 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Adobe Flash Media Server Publisher: iDEFENSE Operating System: Windows Impact: Administrator Compromise Access: Remote/Unauthenticated CVE Names: CVE-2007-6148 CVE-2007-6149 CVE-2007-6431 Original Bulletin: http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=662 http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=663 Comment: This ESB contains two (2) seperate iDefense advisories. Revision History: February 15 2008: Added CVE February 13 2008: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- iDefense Security Advisory 02.12.08 http://labs.idefense.com/intelligence/vulnerabilities/ Feb 12, 2008 I. BACKGROUND Adobe Flash Media Server is an application server for Flash based applications. It provides an environment to run interactive media applications, as well as audio and video streaming functionality. More information can be found at the vendor's web site at the following URL. http://www.adobe.com/products/flashmediaserver/ II. DESCRIPTION Remote exploitation of a memory corruption vulnerability in Adobe Systems Inc.'s Flash Media Server 2 could allow an unauthenticated attacker to execute arbitrary code with SYSTEM privileges. The Flash Media Server contains a component called the Edge server, which listens on TCP ports 1935 and 19350 for incoming connections. This port is the primary port used for client/server communication. The Edge server speaks the Real Time Message Protocol, or RTMP, a proprietary binary protocol developed by Adobe. This vulnerability exists within the code responsible for parsing RTMP messages. A certain sequence of requests can lead to an area of memory being used after it has been released. This leads to the execution of arbitrary code. III. ANALYSIS Exploitation of this vulnerability results in the execution of arbitrary code with SYSTEM level privileges. In order to exploit this vulnerability, an attacker only needs the ability to connect to the target server on TCP port 1935 or 19350. Unsuccessful attempts at exploitation will likely result in the Edge server crashing. After crashing, the Edge server will be restarted automatically. This gives an attacker an unlimited number of attempts at exploitation. IV. DETECTION iDefense has confirmed the existence of this vulnerability in Flash Media Server 2 version 2.0.4 on Windows. Previous versions, as well as the Linux version, may also be affected. V. WORKAROUND iDefense is currently unaware of any workarounds for this issue. VI. VENDOR RESPONSE Adobe has addressed this vulnerability by releasing version 2.0.5 of Flash Media Server. For more information, consult their bulletin at the following URL. http://www.adobe.com/support/security/bulletins/apsb08-03.html VII. CVE INFORMATION The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2007-6148 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 11/27/2007 Initial vendor notification 11/27/2007 Initial vendor response 02/12/2008 Coordinated public disclosure IX. CREDIT This vulnerability was discovered by Sean Larsson, VeriSign iDefense Labs. 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. iDefense Security Advisory 02.12.08 http://labs.idefense.com/intelligence/vulnerabilities/ Feb 12, 2008 I. BACKGROUND Adobe Flash Media Server is an application server for Flash based applications. It provides an environment to run interactive media applications, as well as audio and video streaming functionality. More information can be found at the vendor's web site at the following URL. http://www.adobe.com/products/flashmediaserver/ II. DESCRIPTION Remote exploitation of multiple integer overflow vulnerabilities in Adobe Systems Inc.'s Flash Media Server 2 could allow an unauthenticated attacker to execute arbitrary code with SYSTEM privileges. The Flash Media Server contains a component called the Edge server, which listens on TCP ports 1935 and 19350 for incoming connections. This port is the primary port used for client/server communication. The Edge server speaks the Real Time Message Protocol, or RTMP, a proprietary binary protocol developed by Adobe. These vulnerabilities exist within the code responsible for parsing RTMP messages. In each case, a 32-bit value taken directly from the packet is used in an arithmetic operation to calculate the number of bytes to allocate for a dynamic buffer. This operation can overflow, which later leads to a heap overflow. III. ANALYSIS Exploitation of these vulnerabilities results in the execution of arbitrary code with SYSTEM level privileges. In order to exploit these vulnerabilities, an attacker only needs the ability to connect to the target server on TCP port 1935 or 19350. Unsuccessful attempts at exploitation will likely result in the Edge server crashing. After crashing, the Edge server will be restarted automatically. This gives an attacker an unlimited number of attempts at exploitation. IV. DETECTION iDefense has confirmed the existence of these vulnerabilities in Flash Media Server 2 version 2.0.4 on Windows. Previous versions, as well as the Linux version, may also be affected. V. WORKAROUND iDefense is currently unaware of any workarounds for this issue. VI. VENDOR RESPONSE Adobe has addressed these vulnerabilities by releasing version 2.0.5 of Flash Media Server. For more information, consult their bulletin at the following URL. http://www.adobe.com/support/security/bulletins/apsb08-03.html VII. CVE INFORMATION The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2007-6149 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 11/27/2007 Initial vendor notification 11/27/2007 Initial vendor response 02/12/2008 Coordinated public disclosure IX. CREDIT These vulnerabilities were reported to VeriSign iDefense by Sebastian Apelt. 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. 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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 iQCVAwUBR7TOXCh9+71yA2DNAQJpjQP+LqFkG0kQlj6qcHuSy0xqueDcFikggxwy rfx8jyGwSLMU/NrxHoz+zbM4RWhN6OzXllifUNhYRe6Xt2tjJd0PNog9zTtMeCcE DdFQh389RZxOGUGctm/XZejj80nzHMwTJakYySYn7UNgQ+Zo6JfyPdwXsFIexPmr mMg/XrYWSko= =ye/e -----END PGP SIGNATURE-----