TITLE: Microsoft Internet Explorer Multiple Vulnerabilities SECUNIA ADVISORY ID: SA9711 VERIFY ADVISORY: http://www.secunia.com/advisories/9711/ CRITICAL: Highly critical IMPACT: Cross Site Scripting, Exposure of sensitive information, System access WHERE: From remote SOFTWARE: Microsoft Internet Explorer 5.01 Microsoft Internet Explorer 5.5 Microsoft Internet Explorer 6 DESCRIPTION: Multiple vulnerabilities have been identified in Microsoft Internet Explorer. Some could expose sensitive information others may lead to execution of arbitrary code. 1) File-protocol proxy / WsOpenFileJPU A malicious site may retrieve cookie information from other sites by opening them in the "_search" window. This information may then be retrieved using the file protocol. It is believed that this could also be exploited to execute arbitrary code in the context of the other domain including the local security zone. 2) NavigateAndFind protocol history / NAFjpuInHistory It is possible to retrieve information and execute JavaScript in the context of other sites using the "history.back" function. This may also affect the local security zone. 3) window.open search injection / WsFakeSrc It is possible to open different sites using "window.open" and access information and execute JavaScript in this window at any given time. This may also affect the local security zone. 4) NavigateAndFind file proxy / NAFfileJPU A combination of the file protocol and the NavigateAndFind function allows malicious sites to access information and execute code in a different window and domain. This may also affect the local security zone. 5) Timed history injection / BackMyParent2 It is possible to access information from a site loaded in a different frame and domain using the "history.back" function. 6) history.back method caching / RefBack This is a variant of 5) BackMyParent also allowing a site to access information from a different frame and domain. 7) Click hijacking / HijackClick This allows malicious sites to trick users into performing actions like drag'n'drop a resource from one place to another without their knowledge. An example has been provided allowing sites to add links to "Favorites". However, resources need not be links and the destination could be different than "Favorites". Issues 1-7 have been reported by Liu Die Yu and affect Internet Explorer with all patches. Several other issues have also been published. These however, affect Internet Explorer without all patches installed. Thus they are not concidered relevant as they to some extent are related to previously fixed vulnerabilities. SOLUTION: There is no patch for these issues. The only efficient solution is to disable Active Scripting. Secunia recommends that you disable Active Scripting, ActiveX and plug-ins for all sites. You may then allow execution of this for certain trusted sites on a case by case basis. REPORTED BY / CREDITS: Discovered and published by Liu Die Yu Additional information from Thor Larholm ORIGINAL ADVISORY: http://safecenter.net/liudieyu/WsOpenFileJPU/WsOpenFileJPU-Content.HTM http://safecenter.net/liudieyu/NAFjpuInHistory/NAFjpuInHistory-Content.HTM http://safecenter.net/liudieyu/WsFakeSrc/WsFakeSrc-Content.HTM http://safecenter.net/liudieyu/NAFfileJPU/NAFfileJPU-Content.HTM http://safecenter.net/liudieyu/BackMyParent2/BackMyParent2-Content.HTM http://safecenter.net/liudieyu/RefBack/RefBack-Content.HTM http://safecenter.net/liudieyu/HijackClick/HijackClick-Content.HTM OTHER REFERENCES: http://www.pivx.com/larholm/unpatched/ ---------------------------------------------------------------------- Secunia recommends that you verify all advisories you receive, by clicking the link. Secunia NEVER sends attached files with advisories. Secunia does not advise people to install third party patches, only use those supplied by the vendor. Contact details: Web : http://www.secunia.com/ E-mail : support@secunia.com Tel : +45 7020 5144 Fax : +45 7020 5145 ---------------------------------------------------------------------- Unsubscribe: Secunia Security Advisories http://www.secunia.com/sec_adv_unsubscribe/?email=packet@packetstormsecurity.org ----------------------------------------------------------------------