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Vulnerability Note VU#659761Apple QuickTime RTSP Content-Type header stack buffer overflowOverviewApple QuickTime contains a stack buffer overflow vulnerability that may allow a remote, unauthenticated attacker to execute arbitrary code or cause a denial-of-service condition.I. DescriptionReal Time Streaming Protocol (RTSP) is a protocol that is used by streaming media systems. The Apple QuickTime Streaming Server and QuickTime player both support RTSP.Apple QuickTime contains a stack buffer overflow vulnerability in the way QuickTime handles the RTSP Content-Type header. This vulnerability may be exploited by convincing a user to connect to a specially crafted RTSP stream. Note that QuickTime is a component of Apple iTunes, therefore iTunes installations are also affected by this vulnerability. We are aware of publicly available exploit code for this vulnerability. Uninstall QuickTime
{4063BE15-3B08-470D-A0D5-B37161CFFD69}
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\{02BF25D5-8C17-4B23-BC80-D3488ABDDC6B}] "Compatibility Flags"=dword:00000400 [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\{4063BE15-3B08-470D-A0D5-B37161CFFD69}] "Compatibility Flags"=dword:00000400 Users of Mozilla-based browsers, such as Firefox can disable the QuickTime plugin, as specified in the PluginDoc article Uninstalling Plugins. Disable the RTSP protocol handler Mac OS X users can disable the RTSP protocol handler by editing the ~/Library/Preferences/com.apple.LaunchServices.plist file with Property List Editor. Change the LSHandlerRoleAll value associated with the rtsp LSHanlderURLScheme to something other than com.apple.quicktimeplayer. This process can be simplified by using an application such as RCDefaultApp. Microsoft Windows users should not need to make any changes, as QuickTime does not appear to register itself as the handler for the RTSP protocol on Windows systems. Disable file association for QuickTime files Disable the file association for QuickTime file types to help prevent windows applications from using Apple QuickTime to open QuickTime files. This can be accomplished by deleting the following registry keys:
Disable QuickTime as the RTSP protocol handler on OS X To disable the RTSP registered protocol handler in OS X open ~/Library/Preferences/com.apple.LaunchServices.plist and look through a hundred or more entries to find RTSP and change it to something else. Disable JavaScript For instructions on how to disable JavaScript, please refer to the Securing Your Web Browser document. This can help prevent some attack techniques that use the QuickTime plug-in or ActiveX control. Do not access QuickTime files from untrusted sources Attackers may host malicious QuickTime files on web sites. In order to convince users to visit their sites, those attackers often use a variety of techniques to create misleading links including URL encoding, IP address variations, long URLs, and intentional misspellings. Do not click on unsolicited links received in email, instant messages, web forums, or internet relay chat (IRC) channels. Type URLs directly into the browser to avoid these misleading links. While these are generally good security practices, following these behaviors will not prevent exploitation of this vulnerability in all cases, particularly if a trusted site has been compromised or allows cross-site scripting. Systems Affected
Referenceshttp://www.cert.org/tech_tips/securing_browser/ This vulnerability was publicly disclosed by Krystian Kloskowski. This document was written by Ryan Giobbi and Will Dormann.
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