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-----BEGIN PGP SIGNED MESSAGE----- =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2003.0619 -- Microsoft Security Bulletin MS03-038 Unchecked buffer in Microsoft Access Snapshot Viewer Could Allow Code Execution(827104) 04 September 2003 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Microsoft Access Publisher: Microsoft Operating System: Windows Impact: Execute Arbitrary Code/Commands Access Required: Remote CVE Names: CAN-2003-0665 - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- - - -------------------------------------------------------------------- Title: Unchecked buffer in Microsoft Access Snapshot Viewer Could Allow Code Execution (827104) Date: September 3, 2003 Software: Microsoft Access 97 Microsoft Access 2000 Microsoft Access 2002 Impact: Elevation of Privilege Max Risk: Moderate Bulletin: MS03-038 Microsoft encourages customers to review the Security Bulletins at: http://www.microsoft.com/technet/security/bulletin/MS03-038.asp http://www.microsoft.com/security/security_bulletins/MS03-038.asp - - -------------------------------------------------------------------- Issue: ====== With Microsoft Access Snapshot Viewer, you can distribute a snapshot of a Microsoft Access database that allows the snapshot to be viewed without having Access installed. For example, a customer may want to send a supplier an invoice that is generated by using an Access database. With Microsoft Access Snapshot Viewer, the customer can package the database so that the supplier can view it and print it without having Access installed. The Microsoft Access Snapshot Viewer is available with all versions of Access - though it is not installed by default - and is also available as a separate stand-alone. The Snapshot Viewer is implemented by using an ActiveX control. A vulnerability exists because of a flaw in the way that Snapshot Viewer validates parameters. Because the parameters are not correctly checked, a buffer overrun can occur, which could allow an attacker to execute the code of their choice in the security context of the logged-on user. For an attack to be successful, an attacker would have to persuade a user to visit a malicious Web site that is under the attacker's control. Mitigating Factors: ==================== * The Microsoft Access Snapshot Viewer is not installed with Microsoft Office by default. * An attacker would need to persuade a user to visit a website under the attacker's control for an attack to be successful. * An attacker's code would run with the same permissions as the user. If a user's permissions were restricted the attacker would be similarly restricted. Risk Rating: ============ -Moderate Patch Availability: =================== - A patch is available to fix this vulnerability. Please read the Security Bulletins at http://www.microsoft.com/technet/security/bulletin/MS03-038.asp http://www.microsoft.com/security/security_bulletins/MS03- 038.asp for information on obtaining this patch. Acknowledgment: =============== - Oliver Lavery (oliver.lavery@sympatico.ca) - - --------------------------------------------------------------------- THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. - -----BEGIN PGP SIGNATURE----- Version: PGP 7.1 iQEVAwUBP1YPOI0ZSRQxA/UrAQF66wgAobaLCfgLn8Xb413ALZmQlkHGquDHDpO1 mbDjDj8clh6rLMtVQ3cSAwwWFJRVEe7rtdta+pd3oKBd694M1+rqWZrtcexlYjrj WHRjZwA40zDgB1YS/V6UHV1Jc5vdeN2v9jvuIYPGDFrjMgWD0nl7G2SALj1jBn6/ YPjgKzUKn4wZJ2i138ojl/mtIXKWsQJR5eeNqIf2LwjrgH6JVf9Kwyji8TexT2uJ LJoukN4NIEVlaShLqrwvfrO1lyx0TjOBqRljLe9wedOTU0fPprH6/CBX14lSNW01 st6dfPnEAm+h+FBlArEJV2o98fm1OI2VbHTabT/Iv06yXTqBLrvFKg== =lHKZ - -----END PGP SIGNATURE----- - --------------------------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. 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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 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 iQCVAwUBP1bOAih9+71yA2DNAQHfCgQAjsklgWumYEPDKAqMXD77wxjD4zYgNBzp tF+08YG70c659qfDj7VhHIiXehnUw4YBRpkC4Bgi2m1uAi6gotXaJKcRzGZjRvF9 klZsGiBpZfD9YwtJ8E9GSbbKTYYrb++202q+5WPZDNRXAIR1QpZyfnM0JRrgqkdl SWvxXXv6mZ4= =1S2j -----END PGP SIGNATURE-----