The Nortel UNIStim IP Softphone 2050, IP Phone 1140E, and additional Nortel products from the IP Phone, Business Communications Manager (BCM
The Nortel UNIStim IP Softphone 2050, IP Phone 1140E, and additional Nortel products from the IP Phone, Business Communications Manager (BCM), and other product lines, use only 65536 different values in the 32-bit ID number field of an RUDP datagram, which makes it easier for remote attackers to guess the RUDP ID and spoof messages. NOTE: this can be leveraged for an eavesdropping attack by sending many Open Audio Stream messages.
- Published
- Oct 23, 2007
- Updated
- Jun 16, 2026
- EPSS
- 1.5% · 73th percentile
- CWE
- CWE-200
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Report tools
Action score
17
Monitor
Low priority for now.
- CVSS
- 17 / 40 · 4.3 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 1.5%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| nortel | multimedia communication server 5100 | cpe:2.3:a:nortel:multimedia_communication_server_5100 |
| nortel | multimedia communication server 5200 | cpe:2.3:a:nortel:multimedia_communication_server_5200 |
| nortel | communications server | cpe:2.3:a:nortel:communications_server |
| nortel | ip audio conference phone 2033 | cpe:2.3:h:nortel:ip_audio_conference_phone_2033 |
| nortel | ip phone 1110 | cpe:2.3:h:nortel:ip_phone_1110 |
| nortel | ip phone 1120e | cpe:2.3:h:nortel:ip_phone_1120e |
| nortel | ip phone 1140e | cpe:2.3:h:nortel:ip_phone_1140e |
| nortel | ip phone 1150e | cpe:2.3:h:nortel:ip_phone_1150e |
| nortel | ip phone 2001 | cpe:2.3:h:nortel:ip_phone_2001 |
| nortel | ip phone 2002 | cpe:2.3:h:nortel:ip_phone_2002 |
| nortel | ip phone 2004 | cpe:2.3:h:nortel:ip_phone_2004 |
| nortel | ip phone 2007 | cpe:2.3:h:nortel:ip_phone_2007 |
and 14 more
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- nortel business communications manager1000
- nortel business communications manager200
- nortel business communications manager400
- nortel business communications manager50
- nortel business communications manager50a
- nortel business communications manager50e
- nortel business communications managersrg200
- nortel business communications managersrg50
- nortel centrex ip client managerall versions
- nortel centrex ip element managerall versions
- nortel meridian option 11call versions
- nortel meridian option 51call versions
- nortel meridian option 61call versions
- nortel meridian option 81call versions
- nortel meridian sl100cs2100
- nortel mobile voice client 2050all versions
Same product
nortel: all recordsOther highest-scoring records for the same primary product.
- CVE-2008-5872Multiple unspecified vulnerabilities in the UNIStim File Transfer Protocol (UFTP) processing in IP Client Manager (IPCM) in Nortel Multimedi32Monitor
- CVE-2007-5640The Nortel UNIStim IP Softphone 2050, IP Phone 1140E, and additional Nortel products from the IP Phone, Business Communications Manager (BCM29Monitor
- CVE-2008-5871Nortel Multimedia Communication Server (MSC) 5100 3.0.13 does not verify credentials during call placement, which allows remote attackers to25Monitor
- CVE-2007-5637The Nortel UNIStim IP Softphone 2050, IP Phone 1140E, and additional Nortel products from the IP Phone, Business Communications Manager (BCM18Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
If successful
- Confidentiality
- P · data can be read
- Integrity
- none
- Availability
- none
- Attack complexity
- M
- Confidentiality impact
- P
- Integrity impact
- None
- Availability impact
- None
Weakness class (CWE)
CWE-200 · Exposure of Sensitive Information to an Unauthorized ActorCVSS vector
AV:N/AC:M/Au:N/C:P/I:N/A:N
nvd-primary
Root cause
The extension requests broader permissions than its function needs and sends the data it collects out for purposes beyond its stated function.
The bug in code
The whole CWE-200 classA representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.
Vulnerable
{ "permissions": ["tabs", "<all_urls>"], "background": { "service_worker": "analytics.js" }}Fixed
{ "permissions": ["activeTab"], "host_permissions": ["https://yildiz.example/*"]}Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- ExcavationCAPEC-116likelihood: High · Medium
- Subverting Environment Variable ValuesCAPEC-13likelihood: High · Very High
- FootprintingCAPEC-169likelihood: High · Very Low
- Exploiting Trust in ClientCAPEC-22likelihood: High · High
- FingerprintingCAPEC-224likelihood: High · Very Low
- ICMP Echo Request PingCAPEC-285likelihood: Medium · Low
- TCP SYN ScanCAPEC-287Low
- Enumerate Mail Exchange (MX) RecordsCAPEC-290Low
ATT&CK techniques
- System Service DiscoveryT1007
- System Network Configuration DiscoveryT1016
- Remote System DiscoveryT1018
- System Owner/User DiscoveryT1033
- Masquerading: Match Legitimate Name or LocationT1036.005
- Network Service ScanningT1046
- System Network Connections DiscoveryT1049
- Process DiscoveryT1057
- Permission Groups DiscoveryT1069
- System Information DiscoveryT1082
- File and Directory DiscoveryT1083
- Account DiscoveryT1087
- Multi-Factor Authentication InterceptionT1111
- Peripheral Device DiscoveryT1120
- System Time DiscoveryT1124
- Access Token Manipulation:Token Impersonation/TheftT1134.001
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
- osvdb.org/41770
- secunia.com/advisories/27234
- securityreason.com/securityalert/3272
- www.securityfocus.com/archive/1/482478/100/0/threaded
- exchange.xforce.ibmcloud.com/vulnerabilities/37255
- exchange.xforce.ibmcloud.com/vulnerabilities/42881
Vendor advisories and official records. Exploit/PoC links are deliberately left out.