|
|
|
|
| |
The XMLHttpRequest object is intended to enforce a same-origin security policy, and to prevent the injection of HTTP headers that can be used maliciously. Unpatched releases of Safari on both Windows and MacOS X allow JavaScript to bypass these restrictions. It is possible to insert arbitrary HTTP headers into the request, including the Host header.
Apple has released APPLE-SA-2007-06-22 Security Update 2007-006, and APPLE-SA-2007-06-22 Safari 3 Beta Update 3.0.2 which address this issue. |
| |
Credit:
The information has been provided by Richard Moore.
The original article can be found at: http://www.westpoint.ltd.uk/advisories/wp-07-0002.txt
|
| |
It is possible to bypass the security restrictions of the XMLHttpRequest setRequestHeader function to include arbitrary headers by specifying values containing newline characters. For example, a request such as this is treated as valid:
xmlhttp.setRequestHeader('Foo', 'baa\nHost: test\n');
and results in:
GET / HTTP/1.1
Accept-Encoding: gzip, deflate
Accept-Language: en
Foo: baa
Host: test
Impact:
This allows a malicious site to cause the user's browser to attack other sites that are virtual servers on the same IP address (eg. via SQL injection or cross-site scripting). Potentially any header can be injected. If the user is accessing the web via a proxy then potentially any site can be attacked.
Timeline:
14/06/2007 - Apple informed of the vulnerability
22/06/2007 - Patch released
25/06/2007 - Confirmed that the fix addresses the issue
25/06/2007 - Westpoint advisory release
CVE Information:
CVE-2007-2401
|
|
|
|
|
|
|
|
|
|
