{"cve":"CVE-2003-1109","nvd":{"published":"2003-12-31T05:00:00.000","modified":"2026-06-16T22:03:32.523","status":"Modified","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.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["http://www.cert.org/advisories/CA-2003-06.html","http://www.cisco.com/warp/public/707/cisco-sa-20030221-protos.shtml","http://www.ee.oulu.fi/research/ouspg/protos/testing/c07/sip/","http://www.kb.cert.org/vuls/id/528719","http://www.securityfocus.com/bid/6904"],"products":["cisco:ios","cisco:ip_phone_7940","cisco:ip_phone_7960","cisco:pix_firewall_software"],"source":"nvd","synced_at":"2026-10-19T19:35:54.859949650+00:00"},"epss":{"cve":"CVE-2003-1109","score":0.06794,"percentile":0.93998,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}