CVE-2007-5640

Public Exploit

Description

The Nortel UNIStim IP Softphone 2050, IP Phone 1140E, and additional Nortel products from the IP Phone, Business Communications Manager (BCM), Mobile Voice Client, and other product lines, allow remote attackers to block calls and force re-registration via a resume message to the Signaling Server that has a spoofed source IP address for the phone. NOTE: the attack is more disruptive if a new spoofed resume message is sent after each re-registration.

7.1

CVSS

Severity: High

CVSS 2.0 •

EPSS 1.17% Top 25%

Vendor Advisory secunia.com

Affected: n/a n/a

References

Link	Tags
http://support.nortel.com/go/main.jsp?cscat=BLTNDETAIL&id=654641	patch
http://secunia.com/advisories/27234	third party advisory vendor advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/37254	vdb entry
http://osvdb.org/41772	vdb entry
http://securityreason.com/securityalert/3274	third party advisory
http://www.csnc.ch/static/advisory/csnc/nortel_IP_phone_forced_re-authentication_v1.0.txt	exploit
http://www.securityfocus.com/archive/1/482481/100/0/threaded	mailing list
http://www.securityfocus.com/bid/26124	vdb entry

Frequently Asked Questions

What is the severity of CVE-2007-5640?: CVE-2007-5640 has been scored as a high severity vulnerability.
How to fix CVE-2007-5640?: To fix CVE-2007-5640, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2007-5640 being actively exploited in the wild?: It is possible that CVE-2007-5640 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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