Cisco IP Phone SIP INVITE sequence denial of service
| cisco-ipphone-invite-dos (38853) |  Medium Risk |
Description:
Cisco IP Phone 7940 running firmware P0S3-08-7-00 is vulnerable to a denial of service, caused by improper handling of the state engine in the SIP stack. By sending a sequence of specially-crafted SIP INVITE messages without a username, a remote attacker could prevent the device from sending and receiving calls and force it to reboot.
*CVSS:
| Base Score: | 5 |
| Access Vector: | Network |
| Access Complexity: | Low |
| Authentication: | None |
| Confidentiality Impact: | None |
| Integrity Impact: | None |
| Availability Impact: | Partial |
| Temporal Score: | 4.5 |
| Exploitability: | Proof-of-Concept |
| Remediation Level: | Unavailable |
| Report Confidence: | Confirmed |
Consequences:
Denial of Service
Remedy:
No remedy available as of July 9, 2011.
References:
- Cisco.com Login Page: CISCO Log In. (For registered users.)
- Full-Disclosure Mailing List, Sat, 8 Dec 2007 02:29:50 -0500: Cisco Phone 7940 remote DOS.
- Full-Disclosure Mailing List, Sat, 8 Dec 2007 02:29:50 -0500: Re: Cisco Phone 7940 remote DOS.
- BID-26711: Cisco 7940 SIP Phone INVITE Message Remote Denial of Service Vulnerability
- CVE-2007-5583: Cisco IP Phone 7940 with firmware P0S3-08-7-00 allows remote attackers to cause a denial of service (486 Busy responses or device reboot) via a sequence of SIP INVITE transactions in which the Request-URI lacks a user name, a different vulnerability than CVE-2007-4459.
- CVE-2007-6370: Cisco IP Phone 7940 with firmware P0S3-08-7-00 allows remote attackers to cause a denial of service (486 Busy responses or device reboot) via a sequence of SIP INVITE transactions in which the Request-URI lacks a user name, a different vulnerability than CVE-2007-4459.
- SA27898: Cisco IP Phone 7940 SIP INVITE Denial of Service Vulnerability
- SECTRACK ID: 1019059: Cisco 7940 IP Phone Can Be Crashed By Remote Users Sending a Sequence of SIP INVITE Requests
Platforms Affected:
- Cisco IP Phone 7940 P0S3-08-7-00
Reported:
Dec 05, 2007
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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.