CVE-2007-5640 Denial of service in n/a

High 7.1 Published 23 Oct 2007 Updated 7 Aug 2024

Remote attackers can block calls and force re-registration on Nortel IP phones by sending spoofed resume messages to the Signaling Server.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2007-5640?

CVE-2007-5640 is a high-severity denial of service vulnerability in n/a, published on 23 Oct 2007. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Which versions are affected by CVE-2007-5640?

It affects 9 products.

Products include Nortel Business Communications Manager, Nortel Centrex Ip Client Manager, Nortel Centrex Ip Element Manager, Nortel Meridian Option 11c, Nortel Meridian Option 51c, Nortel Meridian Option 61c and 3 more.

How do I fix CVE-2007-5640?

No fix has been published for CVE-2007-5640 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2007-5640 being exploited?

There is no known exploitation of CVE-2007-5640 in the wild and no public exploit code.

Sources

Also known as GHSA-v3jg-64qp-m2qp.