{"id":"CVE-2020-25710","title":"A flaw was found in OpenLDAP in versions before 2.4.56","summary":"A flaw was found in OpenLDAP in versions before 2.4.56. This flaw allows an attacker who sends a malicious packet processed by OpenLDAP to force a failed assertion in csnNormalize23(). The highest threat from this vulnerability is to sys…","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-617"],"vendor":"openldap","product":"openldap","affected":["openldap < 2.4.56","jboss_core_services","jboss_enterprise_application_platform = 5.0.0","jboss_enterprise_web_server = 2.0.0","enterprise_linux = 5.0","enterprise_linux = 6.0","enterprise_linux = 7.0","debian_linux = 9.0","fedora = 33"],"patched":["openldap 2.4.56"],"published":"2021-05-28","updated":"2026-10-14","sourceUpdated":"2026-10-14T10:17:33.353","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2020-25710","references":[{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1899678","label":"secalert@redhat.com"},{"url":"https://git.openldap.org/openldap/openldap/-/commit/ab3915154e69920d480205b4bf5ccb2b391a0a1f#a2feb6ed0257c21c6672793ee2f94eaadc10c72c","label":"secalert@redhat.com"},{"url":"https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E","label":"secalert@redhat.com"},{"url":"https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E","label":"secalert@redhat.com"},{"url":"https://lists.debian.org/debian-lts-announce/2020/12/msg00008.html","label":"secalert@redhat.com"},{"url":"https://security.netapp.com/advisory/ntap-20210716-0003/","label":"secalert@redhat.com"},{"url":"https://www.debian.org/security/2020/dsa-4792","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1899678","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.openldap.org/openldap/openldap/-/commit/ab3915154e69920d480205b4bf5ccb2b391a0a1f#a2feb6ed0257c21c6672793ee2f94eaadc10c72c","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2020/12/msg00008.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20210716-0003/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.debian.org/security/2020/dsa-4792","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":0.02666,"epssPercentile":0.85361,"ingestedAt":"2026-10-14T10:25:41.190Z","slug":"CVE-2020-25710","body":"## Overview\n\nA flaw was found in OpenLDAP in versions before 2.4.56. This flaw allows an attacker who sends a malicious packet processed by OpenLDAP to force a failed assertion in csnNormalize23(). The highest threat from this vulnerability is to system availability.\n\n## Affected\n\n- `openldap < 2.4.56`\n- `jboss_core_services`\n- `jboss_enterprise_application_platform = 5.0.0`\n- `jboss_enterprise_web_server = 2.0.0`\n- `enterprise_linux = 5.0`\n- `enterprise_linux = 6.0`\n- `enterprise_linux = 7.0`\n- `debian_linux = 9.0`\n- `fedora = 33`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `openldap 2.4.56`","depth":"twilight","depthScore":42,"depthScoreParts":{"impact":41.3,"likelihood":0.5,"exploitation":0,"ransomware":0},"changes":[]}