CVE-2020-35518

Name: CVE-2020-35518
Creator: NVD / NIST
Published: 2021-03-26T17:15:12.28+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 1.54%

Last modified Jun 17, 2026

CVE-2020-35518 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. When binding against a DN during authentication, the reply from 389-ds-base will be different whether the DN exists or not. This can be used by an unauthenticated attacker to check the existence of an entry in the LDAP database.. EPSS estimates a 1.54% chance of exploitation in the next 30 days.

Description

When binding against a DN during authentication, the reply from 389-ds-base will be different whether the DN exists or not. This can be used by an unauthenticated attacker to check the existence of an entry in the LDAP database.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

1.54%

71.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Redhat	389 Directory Server	< 1.4.3.19
Redhat	389 Directory Server	>= 1.4.4.0, < 1.4.4.13
Redhat	389 Directory Server	>= 2.0.0, < 2.0.3
Redhat	Directory Server	11.0
Redhat	Enterprise Linux	7.0
Redhat	Enterprise Linux	8.0

References

https://bugzilla.redhat.com/show_bug.cgi?id=1905565Issue Tracking, Patch, Vendor Advisory
https://github.com/389ds/389-ds-base/commit/b6aae4d8e7c8a6ddd21646f94fef1bf7f22c3f32Patch, Third Party Advisory
https://github.com/389ds/389-ds-base/commit/cc0f69283abc082488824702dae485b8eae938bcPatch, Third Party Advisory
https://github.com/389ds/389-ds-base/issues/4480Patch, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1905565Issue Tracking, Patch, Vendor Advisory
https://github.com/389ds/389-ds-base/commit/b6aae4d8e7c8a6ddd21646f94fef1bf7f22c3f32Patch, Third Party Advisory
https://github.com/389ds/389-ds-base/commit/cc0f69283abc082488824702dae485b8eae938bcPatch, Third Party Advisory
https://github.com/389ds/389-ds-base/issues/4480Patch, Third Party Advisory

Timeline

Published: Mar 26, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-35518?

How severe is CVE-2020-35518?

CVE-2020-35518 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 1.54% probability of exploitation in the next 30 days.

How do I fix CVE-2020-35518?

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-2020-35518?

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

Scan your code now

Source: NVD / NIST