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Bulletins   Conferences   News & Media   Services   Web Log   Site Map   Site Help   Member login Login »  Become a member »   Home » Security Bul... » By Operating... » UNIX (all) » BSD (all) » AU-2008.0002 -- AusCERT Update - [Win][UNIX/Linux] -...   AU-2008.0002 -- AusCERT Update - [Win][UNIX/Linux] - Adobe Reader - Multiple Vulnerabilities Date: 13 February 2008 References: ESB-2008.0132  ESB-2008.0201   Click here for printable version -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 AusCERT Update AU-2008.0002 - [Win][UNIX/Linux] Adobe Reader - Multiple Vulnerabilities 13 February 2008 AusCERT Update Summary ---------------------- Product: Adobe Reader 8.1.1 and prior Publisher: iDEFENSE Operating System: Windows UNIX variants (UNIX, Linux, OSX) Impact: Execute Arbitrary Code/Commands Access: Remote/Unauthenticated CVE Names: CVE-2007-5659 CVE-2007-5663 CVE-2007-5666 CVE-2008-0655 CVE-2008-0667 CVE-2008-0726 Ref: ESB-2008.0132 Original Bulletin: http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=655 http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=656 http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=657 Comment: The following three (3) iDefense Security Advisories provide more detail about the Adobe Reader vulnerability addressed by 8.1.2. There is currently known active exploitation of these vulnerabilities. Revision History: February 13 2008: Added CVEs February 11 2008: Corrected formatting February 11 2008: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- iDefense Security Advisory 02.08.08 http://labs.idefense.com/intelligence/vulnerabilities/ Feb 08, 2008 I. BACKGROUND Adobe Reader is a program for viewing Portable Document Format (PDF) documents. Acrobat is the program used to create such documents. More information is available at the following URLs. http://www.adobe.com/products/acrobat/ http://www.adobe.com/products/reader/ II. DESCRIPTION Remote exploitation of multiple stack-based buffer overflows in JavaScript methods in Adobe Reader and Acrobat could allow an attacker to execute arbitrary code as the current user. These issues exist due to insufficient input validation in several JavaScript methods. Inadequate checking is performed on the string length before it is copied into a fixed sized buffer on the stack. If an attacker supplies a long string, control structures on the stack may be modified, allowing the execution of arbitrary code. III. ANALYSIS Exploitation of these vulnerabilities would allow an attacker to execute arbitrary code as the current user. In order to exploit these vulnerabilities, an attacker would have to convince a targeted user to open a maliciously constructed file. This file could be sent directly to the targeted user or linked from a website. IV. DETECTION iDefense has confirmed these vulnerabilities exist in Adobe Reader 8.1 on Windows XP SP2. It is likely that other Adobe products that handle PDF files, including previous versions of Adobe Reader, are also affected. V. WORKAROUND Disabling JavaScript in Adobe Reader or Acrobat will limit exposure to these vulnerabilities. When JavaScript is disabled, Adobe Reader will prompt the user that some components of the document may not function, and provide an opportunity to enable it. VI. VENDOR RESPONSE Adobe released version 8.1.2 of Adobe Reader and Acrobat to address these vulnerabilities. Although there is currently no update for version 7.0.9, Adobe reports it does plan to release one at a later date. For more information, visit the vendor's advisory at the following URL. http://www.adobe.com/support/security/advisories/apsa08-01.html VII. CVE INFORMATION The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2007-5659 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 10/10/2007 Initial vendor notification 10/10/2007 Initial vendor response 10/26/2007 Request for status 10/26/2007 Status - Est. early January 01/04/2008 Request for status 01/04/2008 Status - Scheduled early February 01/28/2008 Adobe plans patch for 8, but not 7 01/30/2008 Concerns about the plan e-mailed to Adobe 01/31/2008 Telephone call to clarify concerns 02/06/2008 Adobe releases 8.1.2 02/06/2008 Immunity makes PoC available to partners 02/07/2008 Adobe publishes APSA08-01 02/08/2008 Exploit discovered in the wild 02/08/2008 Public disclosure IX. CREDIT These vulnerabilities were discovered by Greg MacManus of 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 02.08.08 http://labs.idefense.com/intelligence/vulnerabilities/ Feb 08, 2008 I. BACKGROUND Adobe Reader is a program for viewing Portable Document Format (PDF) documents. Acrobat is the program used to create such documents. More information is available at the following URLs. http://www.adobe.com/products/acrobat/ http://www.adobe.com/products/reader/ II. DESCRIPTION Remote exploitation of an insecure method exposed by the JavaScript library in Adobe Reader and Acrobat could allow an attacker to execute arbitrary code as the current user. Adobe Reader and Acrobat implement a version of JavaScript in the EScript.api plug-in which is based on the reference implementation used in Mozilla products. One of the methods exposed allows direct control over low level features of the object, which in turn allows execution of arbitrary code. III. ANALYSIS Exploitation of this vulnerability would allow an attacker to execute arbitrary code as the current user. In order to exploit this vulnerability, an attacker would have to convince the targeted user to open a maliciously constructed file. This file could be sent directly to the targeted user or linked from a website. Insufficient error checking is performed on the input which allows, among other things, attacker-supplied data to be written to arbitrary offsets in memory, potentially resulting in arbitrary code execution. IV. DETECTION iDefense has confirmed this vulnerability exists in Adobe Reader 8.1 on Windows XP SP2. It is likely that other Adobe products that handle PDF files, including previous versions of Adobe Reader, are also affected. V. WORKAROUND Disabling JavaScript in Adobe Reader or Acrobat will limit exposure to this vulnerability. When JavaScript is disabled, Adobe Reader will prompt the user that some components of the document may not function, and provide an opportunity to enable it. VI. VENDOR RESPONSE Adobe released version 8.1.2 of Adobe Reader and Acrobat to address this vulnerability. Although there is currently no update for version 7.0.9, Adobe reports it does plan to release one at a later date. For more information, visit the vendor's advisory at the following URL. http://www.adobe.com/support/security/advisories/apsa08-01.html VII. CVE INFORMATION The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2007-5663 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 10/03/2007 Initial vendor notification 10/03/2007 Initial vendor response 10/26/2007 Request for status 10/26/2007 Status - Est. early January 01/04/2008 Request for status 01/04/2008 Status - Scheduled early February 01/28/2008 Adobe plans patch for 8, but not 7 01/30/2008 Concerns about the plan e-mailed to Adobe 01/31/2008 Telephone call to clarify concerns 02/06/2008 Adobe releases 8.1.2 02/07/2008 Adobe publishes APSA08-01 02/08/2008 Public disclosure IX. CREDIT This vulnerability was discovered by Greg MacManus of 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 02.08.08 http://labs.idefense.com/intelligence/vulnerabilities/ Feb 08, 2008 I. BACKGROUND Adobe Reader is a program for viewing Portable Document Format (PDF) documents. More information is available at the following URLs. http://www.adobe.com/products/reader/ II. DESCRIPTION Remote exploitation of an unsafe library path vulnerability in Adobe Systems Inc.'s Adobe Reader may allow attackers to execute arbitrary code as the current user. This vulnerability is due to Adobe Reader using a path for "Security Provider" libraries that contains the directory the application was started in. Security Provider libraries provide encryption and signature verification routines to applications. If the current directory contains a file with the same name as a Security Provider library, the file will be loaded into the application, potentially allowing code execution. III. ANALYSIS Exploitation allows an attacker to execute arbitrary code as the user that started the application. To exploit this vulnerability, the attacker must convince the targeted user to open a PDF from a directory under their control. This directory may be local or network based on either an SMB or WebDAV server. If Adobe Reader has already been started, the library will not be loaded. IV. DETECTION iDefense has confirmed this vulnerability exists in Adobe Reader 8.1 installed on Windows XP and Windows Vista. Previous versions, as well as those for other platforms, may also be affected. V. WORKAROUND Copying the original library from "%WINDIR%\System32" to the same directory as the AcroRd32.exe binary will make the application find the correct library before a malicious one is found. The actual filenames which can be used to exploit this vulnerability depend on the operating system and version. To determine which filenames affect your system, consult the following registry key. HKLM\System\CurrentControlSet\Control\SecurityProviders\SecurityProviders This is only a temporary workaround; future software updates will not update these copies. As such, the copies should be removed once this vulnerability has been patched. VI. VENDOR RESPONSE Adobe has released version 8.1.2 of Adobe Reader that addresses this vulnerability. Although there is currently no update for version 7.0.9, Adobe reports it does plan to release one at a later date. For more information, visit the vendor's advisory at the following URL. http://www.adobe.com/support/security/advisories/apsa08-01.html VII. CVE INFORMATION The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2007-5666 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 09/25/2007 Initial vendor notification 09/25/2007 Initial vendor response 10/26/2007 Request for status 10/26/2007 Status - Est. early January 01/04/2008 Request for status 01/04/2008 Status - Scheduled early February 01/28/2008 Adobe plans patch for 8, but not 7 01/30/2008 Concerns about the plan e-mailed to Adobe 01/31/2008 Telephone call to clarify concerns 02/06/2008 Adobe releases 8.1.2 02/07/2008 Adobe publishes APSA08-01 02/08/2008 Public disclosure IX. CREDIT This vulnerability was discovered by Greg MacManus of 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. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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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 iQCVAwUBR7JSfSh9+71yA2DNAQINnQP/ZxpjMgbOmvhgsiR4iuEeei/URQfbYtw7 0L5urP0HMk9Tm0q+2mnEXaT32V5oluIzCZRjnnCW5lIh0pK8DQNPWe3+SbOo+b1o B9EIpDxUAbEm2EW4emhM6zMQSsUnYLAbAp1zguQSvgbIQTeD1HMTTyL0vp0UmhLP 8wGNjst6ZnU= =2LA7 -----END PGP SIGNATURE-----

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