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Apache "Expect" Header Cross-Site Scripting Vulnerability
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Secunia Advisory:
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SA21172
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Release Date:
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2006-07-25
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Last Update:
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2006-08-03
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Critical:
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Less critical
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Impact:
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Cross Site Scripting
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Where:
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From remote
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Solution Status:
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Vendor Patch
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| Software: | Apache 1.3.x
Apache 2.0.x
Apache 2.2.x
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| | CVE reference: | CVE-2006-3918 (Secunia mirror)
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Description:
Thiago Zaninotti has discovered a vulnerability in Apache HTTP Server, which can be exploited by malicious people to conduct cross-site scripting attacks.
Input passed to the "Expect:" header is not properly sanitised before being returned to users. This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of a vulnerable site.
The vulnerability affects versions prior to 1.3.35, 2.0.58, and 2.2.2.
Secunia has constructed a test, which is available at:
http://secunia.com/expect_header_cross-site_scripting_vulnerability_test/
NOTE: This issue was originally not considered a vulnerability by the researcher and vendor due to the fact that no known vectors existed to exploit it. However, additional research by Amit Klein has proven that this can be exploited via a specially crafted Flash file.
Do you have this product installed on your home computer? Scan using the free Personal Software Inspector. Check if a vulnerable version is installed on computers in your corporate network, scan using the Network Software Inspector.
Solution:
Update to version 1.3.35, 2.0.58, 2.2.2, or later.
Provided and/or discovered by:
Thiago Zaninotti
Additional information about exploitation:
Amit Klein
Changelog:
2006-08-03: Added CVE reference.
Original Advisory:
Vendor bug report:
http://svn.apache.org/viewvc?view=rev&revision=394965
Thiago Zaninotti:
http://archives.neohapsis.com/archives/bugtraq/2006-05/0151.html
Amit Klein:
http://archives.neohapsis.com/archives/bugtraq/2006-07/0425.html
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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