{"cve":"CVE-2011-4063","nvd":{"published":"2011-10-21T10:55:03.927","modified":"2026-06-16T23:34:21.963","status":"Modified","description":"chan_sip.c in the SIP channel driver in Asterisk Open Source 1.8.x before 1.8.7.1 and 10.x before 10.0.0-rc1 does not properly initialize variables during request parsing, which allows remote authenticated users to cause a denial of service (daemon crash) via a malformed request.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-20"],"references":["http://downloads.digium.com/pub/security/AST-2011-012.html","http://secunia.com/advisories/46420","http://securityreason.com/securityalert/8478","http://www.securityfocus.com/archive/1/520141/100/0/threaded","http://www.securityfocus.com/bid/50177"],"products":["asterisk:open_source"],"source":"nvd","synced_at":"2026-10-19T19:59:31.623151214+00:00"},"epss":{"cve":"CVE-2011-4063","score":0.0238,"percentile":0.83895,"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."]}