{"cve":"CVE-2009-0871","nvd":{"published":"2009-03-11T14:19:15.420","modified":"2026-06-16T23:06:00.170","status":"Modified","description":"The SIP channel driver in Asterisk Open Source 1.4.22, 1.4.23, and 1.4.23.1; 1.6.0 before 1.6.0.6; 1.6.1 before 1.6.1.0-rc2; and Asterisk Business Edition C.2.3, with the pedantic option enabled, allows remote authenticated users to cause a denial of service (crash) via a SIP INVITE request without any headers, which triggers a NULL pointer dereference in the (1) sip_uri_headers_cmp and (2) sip_uri_params_cmp functions.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-20"],"references":["http://bugs.digium.com/view.php?id=13547","http://bugs.digium.com/view.php?id=14417","http://downloads.digium.com/pub/security/AST-2009-002.html","http://osvdb.org/52568","http://secunia.com/advisories/34229"],"products":["digium:asterisk"],"source":"nvd","synced_at":"2026-10-19T19:53:23.791937413+00:00"},"epss":{"cve":"CVE-2009-0871","score":0.02569,"percentile":0.85151,"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."]}