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Category:   Device (Multimedia)  >   Cisco TelePresence Vendors:   Cisco
Cisco TelePresence VCS and Conductor SDP Processing Flaw Lets Remote Users Deny Service and Authentication Flaw Lets Remote Users Access the System
SecurityTracker Alert ID:  1031910
SecurityTracker URL:  http://securitytracker.com/id/1031910
CVE Reference:   CVE-2015-0652, CVE-2015-0653   (Links to External Site)
Date:  Mar 11 2015
Impact:   Denial of service via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   Two vulnerabilities were reported in Cisco TelePresence VCS and Conductor. A remote user can cause denial of service conditions on the target system. A remote user can bypass security authentication to gain access to the target system.

The following products are affected:

Cisco TelePresence VCS Control
Cisco TelePresence VCS Expressway
Cisco TelePresence VCS Starter Pack Expressway
Cisco Expressway Core
Cisco Expressway Edge
Cisco TelePresence Conductor

A remote user can send specially crafted Session Description Protocol (SDP) packets via TCP or UDP and via IPv4 or IPv6 to the target system to cause the target system to reload [CVE-2015-0652].

The vendor has assigned bug ID CSCus96593 (for Cisco TelePresence VCS and Cisco Expressway) and bug ID CSCun73192 (for Cisco TelePresence Conductor) to this vulnerability.

A remote user with knowledge of a valid username can supply specially crafted parameter values via HTTPS to bypass the system login and gain access to the target system with the privileges of the target user [CVE-2015-0653].

The vendor has assigned bug ID CSCur02680 (for Cisco TelePresence VCS and Cisco Expressway) and bug ID CSCur05556 (for Cisco TelePresence Conductor) to this vulnerability.

Andrey Medov of Positive Technologies company (Positive Research Center) reported the authentication bypass vulnerability.

Impact:   A remote user can cause the target system to reload.

A remote user can bypass security authentication to gain access to the target system.

Solution:   The vendor has issued a fix.

For Cisco TelePresence VCS and Cisco Expressway: X8.5.1
For Cisco TelePresence Conductor: XC3.0.2

The vendor's advisory is available at:

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20150311-vcs

Vendor URL:  tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20150311-vcs (Links to External Site)
Cause:   Authentication error, State error

Message History:   None.


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