CVE-2020-15719: libldap in certain third-party OpenLDAP packages has a certificate-validation flaw when the third-party packag

Q: How do I fix CVE-2020-15719?

openldap: upgrade to 2.4.46-10.el8; enterprise linux: mitigate or apply the listed mitigation; leap: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2020-15719 being exploited?

CVE-2020-15719 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-15719 affect?

CVE-2020-15719 affects openldap, enterprise linux, leap. Severity is medium (CVSS 4.2). libldap in certain third-party OpenLDAP packages has a certificate-validation flaw when the third-party package is asserting RFC6125 support. It considers CN even when there is a non-matching subjectAltName (SAN). This is fixed in, for exam

Q: How urgent is CVE-2020-15719?

Priority 41/100. On your watchlist

This month

MEDIUM 4.2WATCHLISTUPGRADEMITIGATEMITIGATE

CVE-2020-15719 is a medium-severity flaw (CVSS 4.2) affecting openldap, enterprise linux, leap. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

libldap in certain third-party OpenLDAP packages has a certificate-validation flaw when the third-party package is asserting RFC6125 support. It considers CN even when there is a non-matching subjectAltName (SAN). This is fixed in, for example, openldap-2.4.46-10.el8 in Red Hat Enterprise Linux.

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	4.2 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	2.5% (top 15%)
CISA exploited list	No
Weakness	CWE-295
Published	2020-07-14
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: mcafee · openldap · opensuse · oracle · redhat

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-07-14 14:15 UTCPublished CVE record published
2026-06-17 02:57 UTCUpdated Record last modified

openldap openldap UPGRADE

Affected: < 2.4.46-10.el8

Fixed in: 2.4.46-10.el8

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy openldap || rpm -q openldap || openldap --version

2. UPGRADE to 2.4.46-10.el8 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade openldap

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade openldap

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

redhat enterprise linux MITIGATE

Affected: 8.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 8.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

opensuse leap MITIGATE

Affected: 15.1 · 15.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 15.1

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

mcafee policy auditor UPGRADE

Affected: < 6.5.1

Fixed in: 6.5.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy policy-auditor || rpm -q policy-auditor || policy-auditor --version

2. UPGRADE to 6.5.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade policy-auditor

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade policy-auditor

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

oracle blockchain platform UPGRADE

Affected: < 21.1.2

Fixed in: 21.1.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy blockchain-platform || rpm -q blockchain-platform || blockchain-platform --version

2. UPGRADE to 21.1.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade blockchain-platform

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade blockchain-platform

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-15719?

openldap: upgrade to 2.4.46-10.el8; enterprise linux: mitigate or apply the listed mitigation; leap: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-15719 being exploited?

CVE-2020-15719 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-15719 affect?

CVE-2020-15719 affects openldap, enterprise linux, leap. Severity is medium (CVSS 4.2). libldap in certain third-party OpenLDAP packages has a certificate-validation flaw when the third-party package is asserting RFC6125 support. It considers CN even when there is a non-matching subjectAltName (SAN). This is fixed in, for exam

How urgent is CVE-2020-15719?

Priority 41/100. On your watchlist

Software pages

Red Hat Enterprise Linux vulnerabilities · OpenLDAP vulnerabilities · McAfee vulnerabilities

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References

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