{"cve":"CVE-2011-2216","nvd":{"published":"2011-06-06T19:55:03.770","modified":"2026-06-16T23:30:56.670","status":"Modified","description":"reqresp_parser.c in the SIP channel driver in Asterisk Open Source 1.8.x before 1.8.4.2 does not initialize certain strings, which allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a malformed Contact header.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["http://downloads.digium.com/pub/security/AST-2011-007.html","http://lists.fedoraproject.org/pipermail/package-announce/2011-July/062658.html","http://lists.fedoraproject.org/pipermail/package-announce/2011-June/062013.html","http://osvdb.org/72752","http://secunia.com/advisories/44828"],"products":["digium:asterisk"],"source":"nvd","synced_at":"2026-10-19T19:58:50.521460154+00:00"},"epss":{"cve":"CVE-2011-2216","score":0.04618,"percentile":0.91691,"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."]}