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<P><SPAN class=312571513-28062006> </SPAN>Cisco Call Manager Flaw Could
Invite Hackers</FONT> </P><FONT size=4>
<P>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. </P></FONT><FONT face=geneva size=2>
<P>By Kevin McLaughlin, </FONT><A
href="http://www.crn.com/;jsessionid=AOR2TDNJYUNU0QSNDLPSKHSCJUNN2JVN"><U><FONT
face=geneva color=#0000ff size=2>CRN </U></FONT></A><FONT face=geneva
size=2><BR>Jun 19, 2006 <BR>URL:</FONT><A
href="outbind://214/dept/security/189500728"><U><FONT face=geneva color=#0000ff
size=2>http://www.ddj.com/dept/security/189500728 </U></FONT></A><FONT
face=geneva size=2><BR></P></FONT>
<P>Vulnerabilities in Cisco's Call Manager software could open the door for
hackers to reconfigure <A
href="http://www.channelweb.com/encyclopedia/defineterm.jhtml?term=VoIP&x=&y="><U><FONT
color=#0000ff>VoIP</U></FONT></A> settings and gain access to individual users'
account information, according to researchers at Kansas City, Mo.-based solution
provider FishNet Security. </P>
<P>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. </P>
<P>Cross site scripting attacks usually involve tricking users with access
privileges into clicking on a <A
href="http://www.channelweb.com/encyclopedia/defineterm.jhtml?term=URL&x=&y="><U><FONT
color=#0000ff>URL</U></FONT></A> in an email or Web page. </P>
<P>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. </P>
<P>In a statement, Cisco's Product Security Incident Response Team (PSRIT)
recommended that users verify link destinations before clicking on URLs. </P>
<P>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.
</P>
<P>To guard against attacks, FishNet recommends that companies limit network
connectivity to Call Manager wherever possible to prevent hackers from
discovering public Web interfaces. </P>
<P>"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. </P></DIV></BODY></HTML>