{"cve":"CVE-2013-2264","nvd":{"published":"2013-04-01T16:55:03.747","modified":"2026-06-16T23:53:02.797","status":"Modified","description":"The SIP channel driver in Asterisk Open Source 1.8.x before 1.8.20.2, 10.x before 10.12.2, and 11.x before 11.2.2; Certified Asterisk 1.8.15 before 1.8.15-cert2; Asterisk Business Edition (BE) C.3.x before C.3.8.1; and Asterisk Digiumphones 10.x-digiumphones before 10.12.2-digiumphones exhibits different behavior for invalid INVITE, SUBSCRIBE, and REGISTER transactions depending on whether the user account exists, which allows remote attackers to enumerate account names by (1) reading HTTP status codes, (2) reading additional text in a 403 (aka Forbidden) response, or (3) observing whether certain retransmissions occur.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-200"],"references":["http://downloads.asterisk.org/pub/security/AST-2013-003.html","https://issues.asterisk.org/jira/browse/ASTERISK-21013","http://downloads.asterisk.org/pub/security/AST-2013-003.html","https://issues.asterisk.org/jira/browse/ASTERISK-21013"],"products":["asterisk:business_edition","asterisk:certified_asterisk","asterisk:digiumphones","asterisk:open_source"],"source":"nvd","synced_at":"2026-10-19T20:27:27.940201468+00:00"},"epss":{"cve":"CVE-2013-2264","score":0.01252,"percentile":0.69442,"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."]}