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TITLE:
IBM OS/400 HTTP Server "Expect" Header Cross-Site Scripting
Vulnerability

SECUNIA ADVISORY ID:
SA28744

VERIFY ADVISORY:
http://secunia.com/advisories/28744/

CRITICAL:
Less critical

IMPACT:
Cross Site Scripting

WHERE:
>From remote

OPERATING SYSTEM:
OS/400 5.x
http://secunia.com/product/212/

DESCRIPTION:
A vulnerability has been reported in IBM OS/400, which can be
exploited by malicious people to conduct cross-site scripting
attacks.

Input passed via the "Expect" header to the HTTP server is not
properly sanitised before being returned to the user in an error page
when the HTTP server receives an unsupported "Expect" header field
value. This can be exploited to execute arbitrary HTML and script
code in a user's browser session in context of a vulnerable site.

SOLUTION:
Filter malicious characters and character sequences using a web
proxy.

PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.

ORIGINAL ADVISORY:
IBM (SE31823):
http://www-1.ibm.com/support/docview.wss?uid=nas22f5a0f082f6821c4862573e10041f7bd

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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.

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