Cisco IP Phone SIP INVITE sequence denial of service
| cisco-ipphone-invite-dos (38853) |  Low 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.
Platforms Affected:
- Cisco, IP Phone 7940 P0S3-08-7-00
Remedy:
No remedy available as of August 16, 2008.
Consequences:
Denial of Service
References:
- Cisco.com Login Page, CISCO Log In at http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCsl63427. (For registered users.)
- Full-Disclosure Mailing List, Sat, 8 Dec 2007 02:29:50 -0500, Cisco Phone 7940 remote DOS at http://seclists.org/fulldisclosure/2007/Dec/0196.html.
- Full-Disclosure Mailing List, Sat, 8 Dec 2007 02:29:50 -0500, Re: Cisco Phone 7940 remote DOS at http://seclists.org/fulldisclosure/2007/Dec/0196.html.
- 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
Reported:
Dec 05, 2007
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