====================================================================== Secunia Research 13/12/2005 - Internet Explorer Suppressed "Download Dialog" Vulnerability - ====================================================================== Table of Contents Affected Software....................................................1 Severity.............................................................2 Description of Vulnerability.........................................3 Solution.............................................................4 Time Table...........................................................5 Credits..............................................................6 About Secunia........................................................7 Verification.........................................................8 ====================================================================== 1) Affected Software Microsoft Internet Explorer 6.0 Prior versions may also be affected. ====================================================================== 2) Severity Rating: Highly critical Impact: System Access Where: From remote ====================================================================== 3) Description of Vulnerability Secunia Research has discovered a vulnerability in Internet Explorer, which can be exploited by malicious people to trick users into downloading and executing arbitrary programs on a user's system. A design error in the processing of mouse clicks in new browser windows and the predictability of the position of the "File Download" dialog box can be exploited to trick the user into clicking on the "Run" button of the dialog box. This is exploited by first causing a "File Download" dialog box to be displayed underneath a new browser window, and then tricking the user into double-clicking within a specific area in the new window. This will result in an unintended click of the "Run" button in the hidden "File Download" dialog box. ====================================================================== 4) Solution Apply patches. Please see MS05-054 (KB905915): http://www.microsoft.com/technet/security/Bulletin/MS05-054.mspx ====================================================================== 5) Time Table 26/06/2005 - Vulnerability discovered and reported to vendor. 13/12/2005 - Public disclosure. ====================================================================== 6) Credits Discovered by Jakob Balle, Secunia Research. ====================================================================== 7) About Secunia Secunia collects, validates, assesses, and writes advisories regarding all the latest software vulnerabilities disclosed to the public. These advisories are gathered in a publicly available database at the Secunia web site: http://secunia.com/ Secunia offers services to our customers enabling them to receive all relevant vulnerability information to their specific system configuration. Secunia offers a FREE mailing list called Secunia Security Advisories: http://secunia.com/secunia_security_advisories/ ====================================================================== 8) Verification Please verify this advisory by visiting the Secunia web site: http://secunia.com/secunia_research/2005-21/advisory/ Complete list of vulnerability reports released by Secunia Research: http://secunia.com/secunia_research/ ======================================================================