{"cve":"CVE-2011-1720","nvd":{"published":"2011-05-13T17:05:43.207","modified":"2026-06-16T23:29:53.670","status":"Modified","description":"The SMTP server in Postfix before 2.5.13, 2.6.x before 2.6.10, 2.7.x before 2.7.4, and 2.8.x before 2.8.3, when certain Cyrus SASL authentication methods are enabled, does not create a new server handle after client authentication fails, which allows remote attackers to cause a denial of service (heap memory corruption and daemon crash) or possibly execute arbitrary code via an invalid AUTH command with one method followed by an AUTH command with a different method.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-119"],"references":["http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10705","http://lists.opensuse.org/opensuse-security-announce/2011-05/msg00002.html","http://secunia.com/advisories/44500","http://security.gentoo.org/glsa/glsa-201206-33.xml","http://securityreason.com/securityalert/8247"],"products":["postfix:postfix"],"source":"nvd","synced_at":"2026-10-19T19:58:50.521460154+00:00"},"epss":{"cve":"CVE-2011-1720","score":0.21481,"percentile":0.97616,"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."]}