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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2008.0492 -- [Win] Microsoft Internet Explorer 7 DisableCachingOfSSLPages may not prevent caching 14 May 2008 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Internet Explorer 7 Publisher: US-CERT Operating System: Windows Impact: Access Confidential Data Access: Existing Account CVE Names: CVE-2008-2159 Original Bulletin: http://www.kb.cert.org/vuls/id/468843 Revision History: May 14 2008: Added CVE Reference May 13 2008: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- Vulnerability Note VU#468843 Microsoft Internet Explorer 7 DisableCachingOfSSLPages may not prevent caching Overview Setting the Internet Explorer 7 option DisableCachingOfSSLPages may not prevent the caching of SSL-enabled web pages. I. Description Administrators and users can set the Internet Explorer DisableCachingOfSSLPages option to prevent sensitive or private data from being saved to disk. The registry key for this setting is: HKCU\Software\Microsoft\Windows\CurrentVersion\InternetSettings\DisableCachingOfSSLPages After enabling this setting, Internet Explorer 7 may still cache SSL-enabled web pages to disk. II. Impact Private or sensitive data may be written to disk inadvertently. III. Solution We are currently unaware of a practical solution to this problem. Secure deletion Securely deleting or encrypting the Internet Explorer 7 browser cache (%userprofile%\AppData\Local\Microsoft\Windows\Temporary Internet Files\Low) that contains the sensitive information will mitigate this vulnerability. Systems Affected Vendor Status Date Updated Microsoft Corporation Vulnerable 22-Apr-2008 References http://technet2.microsoft.com/windowsserver/en/library/c07587ec-4a60-4bca-8508-29a4296b72121033.mspx?mfr=true http://technet.microsoft.com/en-us/sysinternals/bb897443.aspx http://technet2.microsoft.com/WindowsVista/en/library/58358421-a7f5-4c97-ab41-2bcc61a58a701033.mspx?mfr=true http://blogs.msdn.com/ie/archive/2006/02/09/528963.aspx http://en.wikipedia.org/wiki/Comparison_of_disk_encryption_software Credit Thanks to Bill KNox from MITRE for reporting this vulnerability. This document was written by Ryan Giobbi. Other Information Date Public 05/09/2008 Date First Published 05/09/2008 07:59:14 AM Date Last Updated 05/09/2008 CERT Advisory CVE Name US-CERT Technical Alerts Metric 2.40 Document Revision 18 - --------------------------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 iQCVAwUBSCpcIyh9+71yA2DNAQK9dQQAiA/2muTnKuYw31fh6upvEKVBoy5yN9KD DzA6gcNmBPL4AQFYuca0vr446wLn/HtfmhicRaYWRjMA5rYe4MU+JFl0rfMZfEXD z9K9IU1jIr947ALwd2aRU140zCoAfC4fsL7gMIdRiIzn1usADUEMRbhE7wQXpjwo V/b9C4Y5pDc= =Zq+u -----END PGP SIGNATURE-----