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ACROS Security Problem Report #2009-10-30-1
ASPR #2009-10-30-1: HTML Injection in Oracle WebLogic Server Console
Document ID: ASPR #2009-10-30-1-PUB
Vendor: Oracle (http://www.oracle.com)
Target: Oracle WebLogic Server 10.3
Impact: There is an HTML Injection vulnerability in WebLogic
Server 10.3 Administration Console that allows the
attacker to gain administrative access to the server.
Status: Official patch available, workarounds available
Discovered by: Luka Treiber of ACROS Security
There is an HTML Injection vulnerability in WebLogic Server 10.3
Administration Console that allows the attacker to gain administrative
access to the server. It is possible to craft such URL that will, when
requested from the server, return a document with arbitrarily chosen HTML
injected. An obvious use for this type of vulnerability is cross-site
scripting that can be used, among other things, for obtaining session
cookies from WebLogic administrators. These cookies, when stolen, provide
the attacker with administrative access to WebLogic Administration
Console, compromising the security of the entire web server.
This vulnerability is exploitable even if the Administration Console is
only being accessed via HTTPS, and even if the Administrative Port is
- WebLogic Server 10.3
Note: Our tests were only performed on the above product version. Other
versions may or may not be affected.
Some URL argument in the WebLogic Server 10.3 Administration Console is
not properly sanitized against HTML injection, which allows the attacker
to introduce additional, malicious HTML to the server's response. The
most common type of HTML injection is injection of malicious client-side
script, commonly known as cross-site scripting.
In an actual attack the user would not be required to open URLs specified
by the attacker. Instead, a malicious web page visited by the logged-in
WebLogic administrator would mount the entire attack automatically and
covertly. For instance, a tiny 0x0 pixel iframe could be used for loading
the URL from the demonstration immediately upon administrator's visit to
the malicious page, injecting the malicious script to the WebLogic
server's response. This malicious script would then silently send these
cookies to the attacker's server, where she could pick them up and use
them for entering the administrator's session in the Administration
- In order to execute the above attack, the attacker would need to make
the administrator's browser visit a malicious web page while the
administrator is logged into the Administration Console. This can be
achieved using social engineering, network traffic modification or a
combination of both.
- If the attacker manages to obtain a valid ADMINCONSOLESESSION cookie
(and optionally _WL_AUTHCOOKIE_
only be useful until the administrator logs out of the Administration
Console. However, the attacker knowing that might rush to create a new
administrative user in the console and use that user for WebLogic
administration after the legitimate administrator has logged off.
Oracle has issued a security bulletin  and published a patch which
fixes this issue.
- The WebLogic Administration Console can be disabled, which would
neutralize this vulnerability.
 Oracle Critical Patch Update Advisory - October 2009
We would like to acknowledge Oracle Corporation for
professional handling of the identified vulnerability.
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October 30, 2009: Initial release
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