{"id":"CVE-2020-12243","title":"In filter.c in slapd in OpenLDAP before 2.4.50, LDAP search filters with nested boolean expressions can result in denial of service (daemon crash).","summary":"In filter.c in slapd in OpenLDAP before 2.4.50, LDAP search filters with nested boolean expressions can result in denial of service (daemon crash).","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-674"],"vendor":"openldap","product":"openldap","affected":["openldap < 2.4.50","debian_linux = 8.0","debian_linux = 9.0","debian_linux = 10.0","leap = 15.1","ubuntu_linux = 12.04","ubuntu_linux = 14.04","ubuntu_linux = 16.04","ubuntu_linux = 18.04","ubuntu_linux = 19.10","ubuntu_linux = 20.04","cloud_backup","steelstore_cloud_integrated_storage","h410c_firmware","h300s_firmware","h500s_firmware","h700s_firmware","h300e_firmware","h500e_firmware","h700e_firmware","h410s_firmware","brocade_fabric_operating_system","mac_os_x >= 10.13.0, < 10.13.6","mac_os_x >= 10.14.0, < 10.14.6","mac_os_x >= 10.15, < 10.15.6","mac_os_x = 10.13.6","mac_os_x = 10.14.6","zfs_storage_appliance_kit = 8.8","solaris = 10","solaris = 11"],"patched":["openldap 2.4.50","mac_os_x 10.15.6"],"published":"2020-04-28","updated":"2026-10-14","sourceUpdated":"2026-10-14T10:17:25.933","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2020-12243","references":[{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00016.html","label":"cve@mitre.org"},{"url":"https://bugs.openldap.org/show_bug.cgi?id=9202","label":"cve@mitre.org"},{"url":"https://git.openldap.org/openldap/openldap/-/blob/OPENLDAP_REL_ENG_2_4/CHANGES","label":"cve@mitre.org"},{"url":"https://git.openldap.org/openldap/openldap/-/commit/98464c11df8247d6a11b52e294ba5dd4f0380440","label":"cve@mitre.org"},{"url":"https://lists.debian.org/debian-lts-announce/2020/05/msg00001.html","label":"cve@mitre.org"},{"url":"https://security.netapp.com/advisory/ntap-20200511-0003/","label":"cve@mitre.org"},{"url":"https://support.apple.com/kb/HT211289","label":"cve@mitre.org"},{"url":"https://usn.ubuntu.com/4352-1/","label":"cve@mitre.org"},{"url":"https://usn.ubuntu.com/4352-2/","label":"cve@mitre.org"},{"url":"https://www.debian.org/security/2020/dsa-4666","label":"cve@mitre.org"},{"url":"https://www.oracle.com/security-alerts/cpuapr2022.html","label":"cve@mitre.org"},{"url":"https://www.oracle.com/security-alerts/cpuoct2020.html","label":"cve@mitre.org"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00016.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugs.openldap.org/show_bug.cgi?id=9202","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.openldap.org/openldap/openldap/-/blob/OPENLDAP_REL_ENG_2_4/CHANGES","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.openldap.org/openldap/openldap/-/commit/98464c11df8247d6a11b52e294ba5dd4f0380440","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2020/05/msg00001.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20200511-0003/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/kb/HT211289","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://usn.ubuntu.com/4352-1/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://usn.ubuntu.com/4352-2/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.debian.org/security/2020/dsa-4666","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.oracle.com/security-alerts/cpuapr2022.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.oracle.com/security-alerts/cpuoct2020.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-398330.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd"],"epss":0.04423,"epssPercentile":0.91157,"ingestedAt":"2026-10-14T10:25:41.172Z","slug":"CVE-2020-12243","body":"## Overview\n\nIn filter.c in slapd in OpenLDAP before 2.4.50, LDAP search filters with nested boolean expressions can result in denial of service (daemon crash).\n\n## Affected\n\n- `openldap < 2.4.50`\n- `debian_linux = 8.0`\n- `debian_linux = 9.0`\n- `debian_linux = 10.0`\n- `leap = 15.1`\n- `ubuntu_linux = 12.04`\n- `ubuntu_linux = 14.04`\n- `ubuntu_linux = 16.04`\n- `ubuntu_linux = 18.04`\n- `ubuntu_linux = 19.10`\n- `ubuntu_linux = 20.04`\n- `cloud_backup`\n- `steelstore_cloud_integrated_storage`\n- `h410c_firmware`\n- `h300s_firmware`\n- `h500s_firmware`\n- `h700s_firmware`\n- `h300e_firmware`\n- `h500e_firmware`\n- `h700e_firmware`\n- `h410s_firmware`\n- `brocade_fabric_operating_system`\n- `mac_os_x >= 10.13.0, < 10.13.6`\n- `mac_os_x >= 10.14.0, < 10.14.6`\n- `mac_os_x >= 10.15, < 10.15.6`\n- `mac_os_x = 10.13.6`\n- `mac_os_x = 10.14.6`\n- `zfs_storage_appliance_kit = 8.8`\n- `solaris = 10`\n- `solaris = 11`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `openldap 2.4.50`\n- `mac_os_x 10.15.6`","depth":"twilight","depthScore":42,"depthScoreParts":{"impact":41.3,"likelihood":0.9,"exploitation":0,"ransomware":0},"changes":[]}