CVE-2020-25710

Name: CVE-2020-25710
Creator: NVD / NIST
Published: 2021-05-28T11:15:07.593+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.67%

Last modified Jun 17, 2026

CVE-2020-25710 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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(). EPSS estimates a 2.67% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

2.67%

83.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-617

Affected Software

Vendor	Product	Versions
Openldap	Openldap	< 2.4.56
Redhat	Jboss Core Services	All versions
Redhat	Jboss Enterprise Application Platform	5.0.0
Redhat	Jboss Enterprise Web Server	2.0.0
Redhat	Enterprise Linux	5.0
Redhat	Enterprise Linux	6.0
Redhat	Enterprise Linux	7.0
Debian	Debian Linux	9.0
Fedoraproject	Fedora	33

References

https://bugzilla.redhat.com/show_bug.cgi?id=1899678Issue Tracking, Patch, Third Party Advisory
https://git.openldap.org/openldap/openldap/-/commit/ab3915154e69920d480205b4bf5ccb2b391a0a1f#a2feb6ed0257c21c6672793ee2f94eaadc10c72cPatch, Vendor Advisory
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
https://lists.debian.org/debian-lts-announce/2020/12/msg00008.htmlMailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20210716-0003/Third Party Advisory
https://www.debian.org/security/2020/dsa-4792Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1899678Issue Tracking, Patch, Third Party Advisory
https://git.openldap.org/openldap/openldap/-/commit/ab3915154e69920d480205b4bf5ccb2b391a0a1f#a2feb6ed0257c21c6672793ee2f94eaadc10c72cPatch, Vendor Advisory
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
https://lists.debian.org/debian-lts-announce/2020/12/msg00008.htmlMailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20210716-0003/Third Party Advisory
https://www.debian.org/security/2020/dsa-4792Third Party Advisory

Timeline

Published: May 28, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-25710?

How severe is CVE-2020-25710?

CVE-2020-25710 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.67% probability of exploitation in the next 30 days.

How do I fix CVE-2020-25710?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-25710?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST