{"id":"CVE-2011-1720","aliases":["DEBIAN-CVE-2011-1720","DSA-2233-1","EUVD-2011-1719","GHSA-8j5r-6hhw-hf9g","RHSA-2011:0843"],"status":"published","title":"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...","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.","severity":{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.21693,"percentile":0.9765,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-119"],"published":"2011-05-10T00:00:00Z","modified":"2026-10-23T17:47:28Z","fixes":[{"ecosystem":"Debian:12","package":"postfix","fixed_in":["2.8.3-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"postfix","fixed_in":["2.8.3-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"postfix","fixed_in":["2.8.3-1"],"sources":["osv"]},{"ecosystem":"Red Hat:enterprise_linux:4::as","package":"postfix","fixed_in":["2:2.2.10-1.5.el4"],"sources":["osv"]},{"ecosystem":"Red Hat:enterprise_linux:4::as","package":"postfix-debuginfo","fixed_in":["2:2.2.10-1.5.el4"],"sources":["osv"]},{"ecosystem":"Red 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