[cisco-voip] Have you seen this article?

[Fretz, EA Eric @ IS]

Any network admin that leaves his/her CCM web server facing the internet
needs a good flogging.

-----Original Message-----
From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Ryan Ratliff
Sent: Wednesday, June 28, 2006 8:37 AM
To: Leetun, Rob
Cc: ciscovoip
Subject: Re: [cisco-voip] Have you seen this article?


http://www.cisco.com/en/US/products/sw/voicesw/ps556/ 
tsd_products_security_response09186a00806c0846.html

-Ryan

On Jun 28, 2006, at 9:17 AM, Leetun, Rob wrote:

  Cisco Call Manager Flaw Could Invite Hackers

Vulnerabilities in Cisco's Call Manager software could open the door  
for hackers to reconfigure VoIP settings and gain access to  
individual users' account information, according to researchers at  
Kansas City, Mo.-based solution provider FishNet Security.

By Kevin McLaughlin, CRN
Jun 19, 2006
URL:http://www.ddj.com/dept/security/189500728

Vulnerabilities in Cisco's Call Manager software could open the door  
for hackers to reconfigure VoIP settings and gain access to  
individual users' account information, according to researchers at  
Kansas City, Mo.-based solution provider FishNet Security.

In a report issued Monday, Jake Reynolds, senior security engineer at  
FishNet, said the vulnerability affects versions 3.1 and higher of  
Call Manager, which handles call routing and call signaling functions  
in Cisco VoIP systems. A lack of input validation and output encoding  
in the Web administration interface for Call Manager could allow  
hackers to execute cross-site scripting attacks, Reynolds wrote.

Cross site scripting attacks usually involve tricking users with  
access privileges into clicking on a URL in an email or Web page.

In the Call Manager scenario, attackers would send a request to the  
Call Manager Web interface that causes malicious JavaScript to be  
included. If the administrator could be tricked into submitting this  
tainted request, the malicious code would execute in the victim's Web  
browser and potentially give attackers the ability to delete or  
reconfigure system components and gain access to confidential user  
information, according to the report.

In a statement, Cisco's Product Security Incident Response Team  
(PSRIT) recommended that users verify link destinations before  
clicking on URLs.

Although there are no workarounds for the issue, Cisco has fixed the  
vulnerability and fixes will be incorporated in all supported  
CallManager trains in versions 4.3(1), 4.2(3), 4.1(3)SR4 and 3.3(5) 
SR3, according to the statement.

To guard against attacks, FishNet recommends that companies limit  
network connectivity to Call Manager wherever possible to prevent  
hackers from discovering public Web interfaces.

"Simple Google queries are all an attacker needs in this case to  
obtain the target Call Manager address. There are few compelling  
reasons one could present that would justify public access to Call  
Manager web interfaces," according to the report.

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