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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2009.0596 -- [Win] Foxit Reader: Execute Arbitrary Code 23 June 2009 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Foxit Reader prior to 3.0 Build 1817 Publisher: US-CERT Operating System: Windows Impact: Execute Arbitrary Code/Commands Denial of Service Access: Remote/Unauthenticated CVE Names: CVE-2009-0691 CVE-2009-0690 Original Bulletin: http://www.kb.cert.org/vuls/id/251793 - --------------------------BEGIN INCLUDED TEXT-------------------- US-CERT Vulnerability Note VU#251793 Foxit Reader contains multiple vulnerabilities in the processing of JPX data Overview Foxit Reader contains multiple vulnerabilities that may allow an attacker to execute arbitrary code. I. Description Foxit Reader is software designed to view Portable Document Format (PDF) files. Adobe also distributes the Adobe Acrobat Plug-In to allow users to view PDF files inside of a web browser. Foxit Reader contains multiple vulnerabilities in the handling of JPX (JPEG2000) streams. These vulnerabilities may result in memory corruption. Note: Foxit Reader does not contain the ability to decode JPEG2000 data by default. The JPEG2000 / JBIG Decoder add-on must be installed for Foxit Reader to be vulnerable. When Foxit Reader encounters a PDF document that has JPEG2000 or JBIG data, the user will automatically be prompted to install the add-on, however. II. Impact By convincing a user to open a malicious PDF file, an attacker may be able to execute code or cause a vulnerable PDF viewer to crash. The PDF could be emailed as an attachment or hosted on a website. III. Solution Apply an update This issue is addressed in Foxit Reader 3.0 Build 1817. Updating to this version should trigger the process to upgrade the JPEG2000 / JBIG Decoder component to be updated to version 2.0.2009.616 if a vulnerable version is already installed. Additional details are available in the Foxit Reader security advisory. Disable JavaScript in Foxit Reader Disabling JavaScript may help prevent this and other vulnerabilities from being exploited. Foxit Reader JavaScript can be disabled in the preferences dialog (Edit -> Preferences -> JavaScript and uncheck Enable JavaScript Actions). Note that this will not block the vulnerability. Foxit Reader still may crash when parsing specially crafted PDF documents. Prevent Internet Explorer from automatically opening PDF documents The installer for Foxit Reader configures Internet Explorer to automatically open PDF files without any user interaction. This behavior can be reverted to the safer option of prompting the user by importing the following as a .REG file: Windows Registry Editor Version 5.00 [HKEY_CLASSES_ROOT\FoxitReader.Document] "EditFlags"=hex:00,00,00,00 Disable the displaying of PDF documents in the web browser Preventing PDF documents from opening inside a web browser may help mitigate this vulnerability. If this workaround is applied to updated versions of the Foxit reader, it may help mitigate future vulnerabilities. To prevent PDF documents from automatically being opened in a web browser: 1. Open Foxit Reader. 2. Open the Edit menu. 3. Choose the Preferences option. 4. Choose the Internet section. 5. Uncheck the "Display PDF in browser" check box. Do not access PDF documents from untrusted sources Do not open unfamiliar or unexpected PDF documents, particularly those hosted on web sites or delivered as email attachments. Please see Cyber Security Tip ST04-010. Systems Affected Vendor Status Date Notified Date Updated Foxit Software Company Vulnerable 2009-06-02 2009-06-19 References http://www.foxitsoftware.com/pdf/reader/ http://www.foxitsoftware.com/pdf/reader/security.htm#0602 http://www.foxitsoftware.com/downloads/addons/jpg_decoder2.0.20096.html Credit This vulnerability was reported by Will Dormann of the CERT/CC. This document was written by Will Dormann. Other Information Date Public: 2009-06-19 Date First Published: 2009-06-19 Date Last Updated: 2009-06-19 CERT Advisory: CVE-ID(s): CVE-2009-0690; CVE-2009-0691 NVD-ID(s): CVE-2009-0690 CVE-2009-0691 US-CERT Technical Alerts: Metric: 1.02 Document Revision: 10 - --------------------------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 iD8DBQFKQB2uNVH5XJJInbgRAquhAJ4ymWiHP7XXnYb6L6OEdlCiojkt7QCcCOg3 URtVXYT7OLnM8igQjIFr9C0= =bPA2 -----END PGP SIGNATURE-----