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2004: 3,100 advisories published
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TITLE:
Cisco Unified IP Phone Extension Mobility Weakness

SECUNIA ADVISORY ID:
SA27829

VERIFY ADVISORY:
http://secunia.com/advisories/27829/

CRITICAL:
Not critical

IMPACT:
Security Bypass

WHERE:
>From local network

OPERATING SYSTEM:
Cisco IP Phone 7900 Series
http://secunia.com/product/2809/

DESCRIPTION:
Joffrey Czarney has reported a weakness in Cisco Unified IP Phones,
which can be exploited by malicious people to bypass certain security
restrictions.

The problem is that the Extension Mobility authentication credentials
are not encrypted when communicating with the internal web server of
an IP phone. This can be exploited to sniff the authentication
credentials and perform various actions on a target IP phone (e.g.
remotely login/logout a user or eavesdrop on calls).

Successful exploitation requires that the Extension Mobility feature
is enabled (not enabled by default).

The weakness affects all Cisco IP Phones that support the Extension
Mobility feature.

SOLUTION:
The vendor has provided some workaround to mitigate this issue.
Please see the vendor's advisory for details.

PROVIDED AND/OR DISCOVERED BY:
Joffrey Czarney, Telindus

ORIGINAL ADVISORY:
Cisco (100252):
http://www.cisco.com/warp/public/707/cisco-sr-20071128-phone.shtml

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About:
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