CVE-2007-5640
highpriority · track · 29OT risk · elevatedEPSS 0.018 · 79 %ileEUUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6–7.1
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (17)
Products and version ranges known to be affected.
- nortel business communications manager= 1000nvdUScpe:2.3:a:nortel:business_communications_manager:*:*:*:*:*:*:*:*
- nortel business communications manager= 200nvdUScpe:2.3:a:nortel:business_communications_manager:*:*:*:*:*:*:*:*
- nortel business communications manager= 400nvdUScpe:2.3:a:nortel:business_communications_manager:*:*:*:*:*:*:*:*
- nortel business communications manager= 50nvdUScpe:2.3:a:nortel:business_communications_manager:*:*:*:*:*:*:*:*
- nortel business communications manager= 50anvdUScpe:2.3:a:nortel:business_communications_manager:*:*:*:*:*:*:*:*
- nortel business communications manager= 50envdUScpe:2.3:a:nortel:business_communications_manager:*:*:*:*:*:*:*:*
- nortel business communications manager= srg200nvdUScpe:2.3:a:nortel:business_communications_manager:*:*:*:*:*:*:*:*
- nortel business communications manager= srg50nvdUScpe:2.3:a:nortel:business_communications_manager:*:*:*:*:*:*:*:*
- nortel centrex ip client managerall versionsnvdUScpe:2.3:a:nortel:centrex_ip_client_manager:*:*:*:*:*:*:*:*
- nortel centrex ip element managerall versionsnvdUScpe:2.3:a:nortel:centrex_ip_element_manager:*:*:*:*:*:*:*:*
- nortel mobile voice client 2050all versionsnvdUScpe:2.3:a:nortel:mobile_voice_client_2050:*:*:*:*:*:*:*:*
also known as (2)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (16)
External citations — patches, advisories, analysis.
- http://osvdb.org/41772enisa_euvd
- http://secunia.com/advisories/27234enisa_euvd
- http://securityreason.com/securityalert/3274enisa_euvd
- http://support.nortel.com/go/main.jsp?cscat=BLTNDETAIL&id=654641enisa_euvd
- http://www.csnc.ch/static/advisory/csnc/nortel_IP_phone_forced_re-authentication_v1.0.txtenisa_euvd
- http://www.securityfocus.com/archive/1/482481/100/0/threadedenisa_euvd
- http://www.securityfocus.com/bid/26124enisa_euvd
- https://exchange.xforce.ibmcloud.com/vulnerabilities/37254enisa_euvd
Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.
Free scan