CVE-2020-25710

HIGH

OpenLDAP < 2.4.56 - Denial of Service via csnNormalize23() Assertion Failure

Title source: llm

Description

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 system availability.

References (7)

Core 7

Core References

Third Party Advisory vendor-advisory x_refsource_debian

https://www.debian.org/security/2020/dsa-4792

Mailing List, Third Party Advisory mailing-list x_refsource_mlist

https://lists.debian.org/debian-lts-announce/2020/12/msg00008.html

Issue Tracking, Patch, Third Party Advisory x_refsource_misc

https://bugzilla.redhat.com/show_bug.cgi?id=1899678

Patch, Vendor Advisory x_refsource_misc

https://git.openldap.org/openldap/openldap/-/commit/ab3915154e69920d480205b4bf5ccb2b391a0a1f#a2feb6ed0257c21c6672793ee2f94eaadc10c72c

Mailing List mailing-list x_refsource_mlist

https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E

Mailing List mailing-list x_refsource_mlist

https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E

Third Party Advisory x_refsource_confirm

https://security.netapp.com/advisory/ntap-20210716-0003/

Scores

CVSS v3 7.5

EPSS 0.1746

EPSS Percentile 95.2%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE

CWE-617

Status published

Products (9)

debian/debian_linux 9.0

fedoraproject/fedora 33

openldap/openldap < 2.4.56

redhat/enterprise_linux 5.0

redhat/enterprise_linux 6.0

redhat/enterprise_linux 7.0

redhat/jboss_core_services

redhat/jboss_enterprise_application_platform 5.0.0

redhat/jboss_enterprise_web_server 2.0.0

Published May 28, 2021

Tracked Since Feb 18, 2026