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Vulnerability Note VU#442497Apple QuickTime RTSP buffer overflowOverviewApple QuickTime may allow remote arbitrary code to be executed via a long src parameter in RTSP URL strings.I. DescriptionA vulnerability exists in the way Apple QuickTime handles specially crafted Real Time Streaming Protocol (RTSP) URL strings. An attacker may be able to craft a QTL file to take advantage of this vulnerability. However, there are other attack vectors that do not involve QTL files. According to MOAB-01-01-2007:By supplying a specially crafted string (rtsp:// [random] + semicolon + [299 bytes padding + payload]), an attacker could overflow a stack-based buffer, using either HTML, Javascript or a QTL file as attack vector, leading to an exploitable remote arbitrary code execution condition. II. ImpactA remote, unauthenticated attacker may be able to execute arbitrary code or cause a denial of service.III. SolutionApply UpdateThis issue is addressed in Apple Security Update 2007-001. An update for Mac OS X is available on Apple Downloads and via Software Update. An update for Microsoft Windows XP and 2000 systems is availble via the Apple Software Update application installed with QuickTime 7.1.3.
{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 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 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. 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 issue was reported in MOAB-01-01-2007. This document was written by Chris Taschner and Will Dormann.
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