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Home arrow SecurityAlert Database

Arrow  Topic :

Cisco Unified IP Phone 7960G and 7940G (SIP) RTP Header Vulnerability


Arrow  SecurityAlert : 4917
Arrow  CVE : CVE-2008-4444
Arrow  CWE : CWE-20
Arrow  SecurityRisk : High  Security Risk High  (About)
Arrow  Remote Exploit : Yes
Arrow  Local Exploit : No
Arrow  Victim interaction required : No
Arrow  Exploit Available : No
Arrow  Credit : Laurent Butti
Arrow  Published : 19.01.2009

Arrow  Affected Software : Cisco Unified IP Phone 7960G and 7940G



Arrow  Advisory Content :  

Title:
------
* Cisco Unified IP Phone 7960G and 7940G (SIP) RTP Header Vulnerability

Summary:
--------
* The Cisco Unified IP Phone 7960G and 7940G (SIP) do not correctly
parse some malformed RTP headers leading to a deterministic denial of
service

Assigned CVE:
-------------
* CVE-2008-4444

Details:
--------
* SIP protocol is used to set up calls between phones. Once the call is
established, the media content is carried by the RTP protocol. A remote
attacker could send a specially crafted RTP packet against a Cisco SIP
phone in such a way as to cause the phone to reboot.

Attack Impact:
--------------
* Denial-of-service (reboot or hang-up) and possibly remote arbitrary
code execution

Attack Vector:
--------------
* Have the possibility to setup a call to the targeted phone and carry
RTP frame to the vulnerable device
* Have access to the VoIP network while a call is established and inject
RTP frames

Timeline:
---------
* 2008-06-13 - Vulnerability reported to Cisco
* 2008-06-16 - Full details sent to Cisco
* 2008-10-21 - Cisco released a patched firmware
* 2009-01-14 - Release of this security advisory

Affected Products:
------------------
* Cisco Unified IP Phone 7960G and 7940G (SIP) with P0S3-08-9-00
firmware. Cisco released a patched firmware on October 21, 2008 which is
described in the bug identifier CSCsu22285 (Cisco Unified IP Phone 7960G
and 7940G (SIP) Release Notes for Firmware Release 8.10).

Credits:
--------
* This vulnerability was discovered by Gabriel Campana and Laurent Butti
from France Telecom / Orange



Arrow  References :

http://xforce.iss.net/xforce/xfdb/47948
http://www.securityfocus.com/bid/33264
http://www.securityfocus.com/archive/1/archive/1/500059/100/0/threaded
http://www.cisco.com/en/US/docs/voice_ip_comm/cuipph/7960g_7940g/firmware/sip/8_10/english/release/notes/796040sip_810.html




Arrow  Feedback :

If you have additional information or notice any errors regarding this security advisory, please use contact form or email us at info()securityreason()com.
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