Cisco IP Phone 7940/7960 SIP Message Sequence Denial of Service - Advisories

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Cisco IP Phone 7940/7960 SIP Message Sequence Denial of Service

Secunia Advisory:	SA26547
Release Date:	2007-08-21
Last Update:	2007-08-22

Critical:	Less critical
Impact:	DoS
Where:	From remote
Solution Status:	Vendor Patch

Software:	Cisco IP Phone 7940 Cisco IP Phones 7960

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Description: The Madynes research team at INRIA Lorraine has reported some vulnerabilities in Cisco IP Phone 7940 and 7960, which can be exploited by malicious people to cause a DoS (Denial of Service). The vulnerabilities are caused due to errors within the handling of certain SIP message sequences. These can be exploited to reboot the device by sending a series of specially crafted SIP messages. The vulnerabilities are reported in firmware version POS3-08-6-00. Solution: Update to firmware version 8.7(0). http://www.cisco.com/pcgi-bin/tablebuild.pl/sip-ip-phone7960?psrtdcat20e2 Provided and/or discovered by: Madynes research team at INRIA Lorraine Changelog: 2007-08-22: Updated "Solution" section. Added vendor link. Added the Cisco IP Phone 7960 as affected product. Original Advisory: http://lists.grok.org.uk/pipermail/full-disclosure/2007-August/065401.html http://lists.grok.org.uk/pipermail/full-disclosure/2007-August/065402.html Cisco: http://www.cisco.com/en/US/products/p...ecurity_response09186a00808a6693.html



Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise. Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.

6 Related Secunia Security Advisories

1. Cisco Unified IP Phone Multiple Vulnerabilities

2. Cisco IP Phone 7940 SIP INVITE Denial of Service Vulnerability

3. Cisco IP Phone 7940/7960 SIP INVITE Denial of Service Vulnerability

4. Cisco IP Phones SYN Flood Device Reload Vulnerability

5. Cisco Session Initiation Protocol DoS

6. Cisco IP Phones Design Flaw

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