9.3 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:C/I:C/A:C
0.759 High
EPSS
Percentile
98.2%
Apple QuickTime contains a buffer overflow vulnerability that may allow a remote, unauthenticated attacker to cause a denial-of-service condition and possibly execute arbitrary code.
Real Time Streaming Protocol (RTSP) is a protocol that is used by streaming media systems. Apple QuickTime Streaming Server and QuickTime Player both support RTSP.
Apple QuickTime contains a buffer overflow vulnerability in the way QuickTime handles RTSP response messages. For some RTSP Status-Codes, QuickTime displays the Reason-Phrase (see RFC 2326). When attempting to display a specially crafted Reason-Phrase, QuickTime Player crashes at a memory location that can be conrtrolled by an attacker.
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. Apple Mac OS X and Microsoft Windows versions of QuickTime are affected.
We are aware of publicly available proof-of-concept code for this vulnerability.
By convincing a user to connect to a specially crafted RTSP stream, a remote attacker may be able to cause a denial of service or execute arbitrary code on a vulnerable system. An attacker can use various types of web page content, including a QuickTime Media Link file, to cause a user to load an RTSP stream.
Apple has released QuickTime 7.4.1 to address this issue.
Uninstall QuickTime
Until updates are available, uninstalling QuickTime will mitigate this vulnerability. Note that uninstalling QuickTime will make applications that rely on QuickTime (such as iTunes) fail to run or run with limited functionality.
Block the**rtsp://**
** protocol**
Blocking the RTSP protocol with proxy or firewall rules may help mitigate this vulnerability.
* Blocking outbound access to `554/tcp` and `6970-6999/udp` may partially mitigate this vulnerability. Since RTSP may use a variety of port numbers, blocking the protocol based on a particular port may not be sufficient.
* Content-filtering, proxy servers and application firewalls may also be used to block the RTSP protocol.
Secure your web browser
Follow the guidelines described in the Securing Your Web Browser document. These guidelines include several mitigations against this vulnerability, such as disabling downloads from untrusted sites in Internet Explorer on Microsoft Windows systems and disabling the option to Open “safe” files after downloading in Safari on Apple Mac systems.
Disable the QuickTime ActiveX controls in Internet Explorer
The QuickTime ActiveX controls can be disabled in Internet Explorer by setting the kill bit for the following CLSIDs:
{02BF25D5-8C17-4B23-BC80-D3488ABDDC6B}
{4063BE15-3B08-470D-A0D5-B37161CFFD69}
More information about how to set the kill bit is available in Microsoft Support Document 240797. Alternatively, the following text can be saved as a .REG
file and imported to set the kill bit for these controls:
Windows Registry Editor Version 5.00
[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
Disable the QuickTime plug-in for Mozilla-based browsers
Users of Mozilla-based browsers such as Firefox can disable the QuickTime plugin, as specified in the PluginDoc article Uninstalling Plugins, or by using the NoScript plugin.
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:
HKEY_CLASSES_ROOT\QuickTime.*
This will remove the association for approximately 32 file types that are configured to open with the QuickTime Player software.
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
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Updated: February 07, 2008
Affected
We have not received a statement from the vendor.
The vendor has not provided us with any further information regarding this vulnerability.
Refer to Apple article 307407 for more information.
If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23112179 Feedback>).
Group | Score | Vector |
---|---|---|
Base | ||
Temporal | ||
Environmental |
This vulnerability was disclosed by Luigi Auriemma.
This document was written by Ryan Giobbi, Chris Taschner, Will Dorman and Art Manion.
CVE IDs: | CVE-2008-0234 |
---|---|
Severity Metric: | 13.47 Date Public: |
docs.info.apple.com/article.html?artnum=307407
noscript.net/features#contentblocking
plugindoc.mozdev.org/faqs/uninstall.html
secunia.com/advisories/28423/
support.microsoft.com/kb/240797
tools.ietf.org/html/rfc2326
www.milw0rm.com/exploits/4885
www.milw0rm.com/exploits/4906
www.us-cert.gov/reading_room/securing_browser/