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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2007.0007 -- [Win][UNIX/Linux] Opera Web Browser vulnerabilities allow remote compromise 8 January 2007 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Opera 9.02 and prior Publisher: iDEFENSE Operating System: Windows UNIX variants (UNIX, Linux, OSX) QNX BeOS OS/2 Impact: Execute Arbitrary Code/Commands Access: Remote/Unauthenticated Original Bulletin: http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=457 http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=458 http://www.opera.com/support/search/supsearch.dml?index=852 http://www.opera.com/support/search/supsearch.dml?index=851 Comment: This bulletin contains two separate iDefense advisories for remote vulnerabilities in Opera. These are fixed in Opera 9.10. - --------------------------BEGIN INCLUDED TEXT-------------------- Opera Software Opera Web Browser JPG Image DHT Marker Heap Corruption Vulnerability iDefense Security Advisory 01.05.07 http://labs.idefense.com/intelligence/vulnerabilities/ Jan 05, 2007 I. BACKGROUND Opera is a cross-platform web browser. More information is available at http://www.opera.com/ II. DESCRIPTION Remote exploitation of a heap overflow in Opera Software ASA's Opera Web browser could allow an attacker to execute arbitrary code in the security context of the current user. The vulnerability specifically exists due to Opera improperly processing a JPEG DHT marker. The DHT marker is used to define a Huffman Table which is used for decoding the image data. An invalid number of index bytes in the DHT marker will trigger a heap overflow with partially user controlled data. III. ANALYSIS Exploitation of this vulnerability would allow an attacker to execute arbitrary code on the affected host. The attacker would first need to construct a website containing the malicious image and trick the vulnerable user into visiting the site. This would trigger the vulnerability and allow the code to execute with the privileges of the local user. IV. DETECTION iDefense has confirmed the existence of this vulnerability in Opera version 9.02 on both Windows and Linux. Previous versions may also be affected. V. WORKAROUND iDefense is currently unaware of any effective workarounds for this issue. VI. VENDOR RESPONSE Opera Software has addressed this vulnerability in version 9.10. More information is available at the following link. http://www.opera.com/support/search/supsearch.dml?index=852 VII. CVE INFORMATION A Mitre Corp. Common Vulnerabilities and Exposures (CVE) number has not been assigned yet. VIII. DISCLOSURE TIMELINE 11/16/2006 Initial vendor notification 11/17/2006 Initial vendor response 01/05/2007 Coordinated public disclosure IX. CREDIT This vulnerability was reported to iDefense by Christoph Diehl. 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 © 2006 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.Opera Software Opera Web Browser JPG Image DHT Marker Heap Corruption Vulnerability iDefense Security Advisory 01.05.07 http://labs.idefense.com/intelligence/vulnerabilities/ Jan 05, 2007 I. BACKGROUND Opera is a cross-platform web browser. More information is available at http://www.opera.com/ II. DESCRIPTION Remote exploitation of a heap overflow in Opera Software ASA's Opera Web browser could allow an attacker to execute arbitrary code in the security context of the current user. The vulnerability specifically exists due to Opera improperly processing a JPEG DHT marker. The DHT marker is used to define a Huffman Table which is used for decoding the image data. An invalid number of index bytes in the DHT marker will trigger a heap overflow with partially user controlled data. III. ANALYSIS Exploitation of this vulnerability would allow an attacker to execute arbitrary code on the affected host. The attacker would first need to construct a website containing the malicious image and trick the vulnerable user into visiting the site. This would trigger the vulnerability and allow the code to execute with the privileges of the local user. IV. DETECTION iDefense has confirmed the existence of this vulnerability in Opera version 9.02 on both Windows and Linux. Previous versions may also be affected. V. WORKAROUND iDefense is currently unaware of any effective workarounds for this issue. VI. VENDOR RESPONSE Opera Software has addressed this vulnerability in version 9.10. More information is available at the following link. http://www.opera.com/support/search/supsearch.dml?index=852 VII. CVE INFORMATION A Mitre Corp. Common Vulnerabilities and Exposures (CVE) number has not been assigned yet. VIII. DISCLOSURE TIMELINE 11/16/2006 Initial vendor notification 11/17/2006 Initial vendor response 01/05/2007 Coordinated public disclosure IX. CREDIT This vulnerability was reported to iDefense by Christoph Diehl. 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 © 2006 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. - ----------------------------------------------------------------------------- Opera Software Opera Web Browser createSVGTransformFromMatrix Object Typecasting Vulnerability iDefense Security Advisory 01.05.07 http://labs.idefense.com/intelligence/vulnerabilities/ Jan 05, 2007 I. BACKGROUND Opera is a cross-platform web browser. More information is available at http://www.opera.com/ II. DESCRIPTION Remote exploitation of a typecasting bug in Opera Software ASA's Opera Web browser could allow an attacker to execute arbitrary code on the affected host. A flaw exists within Opera's Javascript SVG implementation. When processing a createSVGTransformFromMatrix request Opera does not properly validate the type of object passed to the function. Passing an incorrect object to this function can result in it using a pointer that is user controlled when it attempts to make the virtual function call. III. ANALYSIS Exploitation of this vulnerability would allow an attacker to execute arbitrary code on the affected host. The attacker would first need to construct a website containing the malicious JavaScript and trick the vulnerable user into visiting the site. This would trigger the vulnerability and allow the code to execute with the privileges of the local user. IV. DETECTION iDefense has confirmed the existence of this vulnerability in Opera version 9.02 on both Windows and Linux. Previous versions may also be affected. V. WORKAROUND Disabling JavaScript will prevent the vulnerability from being triggered. VI. VENDOR RESPONSE Opera Software has addressed this vulnerability in version 9.10. More information is available at the following link. http://www.opera.com/support/search/supsearch.dml?index=852 VII. CVE INFORMATION A Mitre Corp. Common Vulnerabilities and Exposures (CVE) number has not been assigned yet. VIII. DISCLOSURE TIMELINE 11/16/2006 Initial vendor notification 11/17/2006 Initial vendor response 01/05/2007 Coordinated public disclosure IX. CREDIT The discoverer of this vulnerability wishes to remain anonymous. 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 © 2006 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. 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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 iQCVAwUBRaGxBSh9+71yA2DNAQJYFgP8DcSwZdvnQbbxHlln85Bb6r/AsfhCfQbz pk8H14jKOMsxFXmIVbiYU6s0XxbW1D+IL2M6OXzWETl6WI6jqOE2nLsidd/0TaJ9 BPy7B7/FKIAaf9vmMWNm8UEy9/Y8HnupcHw1u0jff/GN/HUjrAz7heWMv/F00qEG kVM7QXJztiE= =XkeC -----END PGP SIGNATURE-----