# CVE-2003-1109

## Summary

- **CVE ID:** CVE-2003-1109
- **Severity:** UNKNOWN
- **CVSS Score:** 0.73
- **CWE:** N/A
- **Published:** Mar 11, 2005
- **Last Modified:** Mar 16, 2026

## 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.

## Affected Products

- n/a — n/a (n/a)

## References

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

## Exploitation Prediction (EPSS)

- **EPSS Score:** 18.23%
- **EPSS Percentile:** 95.1

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._