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TITLE:
Apache "Expect" Header Cross-Site Scripting Vulnerability
SECUNIA ADVISORY ID:
SA21172
VERIFY ADVISORY:
http://secunia.com/advisories/21172/
CRITICAL:
Less critical
IMPACT:
Cross Site Scripting
WHERE:
>From remote
SOFTWARE:
Apache 1.3.x
http://secunia.com/product/72/
Apache 2.0.x
http://secunia.com/product/73/
Apache 2.2.x
http://secunia.com/product/9633/
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.
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
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
About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.
Subscribe:
http://secunia.com/secunia_security_advisories/
Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/
Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.