TITLE:
Cisco IOS HTTP Server Script Insertion Vulnerability

SECUNIA ADVISORY ID:
SA17780

VERIFY ADVISORY:
http://secunia.com/advisories/17780/

CRITICAL:
Moderately critical

IMPACT:
Cross Site Scripting

WHERE:
>From remote

OPERATING SYSTEM:
Cisco IOS 10.x
http://secunia.com/product/184/
Cisco IOS 11.x
http://secunia.com/product/183/
Cisco IOS 12.x
http://secunia.com/product/182/
Cisco IOS R11.x
http://secunia.com/product/53/
Cisco IOS R12.x
http://secunia.com/product/50/

DESCRIPTION:
Hugo Vazquez Carames has reported a vulnerability in Cisco IOS, which
can be exploited by malicious people to conduct script insertion
attacks.

The vulnerability is caused due to the memory dump feature of the
HTTP server not properly sanitising the data in received packets
before displaying them to the user in a HTML formatted page when the
user views the "/level/15/exec/-/buffers/assigned/dump" link. This
can be exploited to execute arbitrary script code in a user's browser
session when the user views a memory dump containing malicious
Javascript/HTML code from a received packet.

Successful exploitation may allow the attacker to perform certain
actions that are accessible by the logon administrator. E.g. changing
the "enable" password by injecting HTML code that requests for the
"/level/15/configure/-/enable/secret/" link.

SOLUTION:
Disable active scripting when viewing memory dumps.

PROVIDED AND/OR DISCOVERED BY:
Hugo Vazquez Carames

ORIGINAL ADVISORY:
http://www.infohacking.com/INFOHACKING_RESEARCH/Our_Advisories/cisco/index.html

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