NVD / CVE Program· CNA mitre

CVE-2020-15719: libldap in certain third-party OpenLDAP packages has a certificate-validation flaw when the third-party package is asserting RFC6125 support

Noroxi assessment

Priority: Monitor (action score 17/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 2.5% (FIRST EPSS); higher than 84.9% of all records.
Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. Special conditions such as timing or configuration are required.
Fixed version: openldap2 (openSUSE:Leap 15.1) 2.4.46-lp151.10.15.1; openldap2 (openSUSE:Leap 15.2) 2.4.46-lp152.14.6.1; openldap (Red Hat:enterprise_linux:8::baseos) 0:2.4.46-10.el8.
Mentioned 2 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to openldap2 (openSUSE:Leap 15.1) 2.4.46-lp151.10.15.1; openldap2 (openSUSE:Leap 15.2) 2.4.46-lp152.14.6.1; openldap (Red Hat:enterprise_linux:8::baseos) 0:2.4.46-10.el8 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

MediumCVSS 4.2 · v3.1—No exploit Fix available

Published: Jul 14, 2020
Updated: Jun 16, 2026
EPSS: 2.5% · 84th percentile
CWE: CWE-295

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 16 / 40 · 4.2 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 1 / 30 · 2.5%

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
openldap	openldap	cpe:2.3:a:openldap:openldap
redhat	enterprise linux	cpe:2.3:o:redhat:enterprise_linux
opensuse	leap	cpe:2.3:o:opensuse:leap
mcafee	policy auditor	cpe:2.3:a:mcafee:policy_auditor
oracle	blockchain platform	cpe:2.3:a:oracle:blockchain_platform

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Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

mcafee policy auditorbefore 6.5.1
openldap openldapbefore 2.4.46-10.el8
opensuse leap15.1
opensuse leap15.2
oracle blockchain platformbefore 21.1.2
redhat enterprise linux8.0

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Debian:12	openldap	from 0	—
openSUSE:Leap 15.1	openldap2	before 2.4.46-lp151.10.15.1	2.4.46-lp151.10.15.1
openSUSE:Leap 15.2	openldap2	before 2.4.46-lp152.14.6.1	2.4.46-lp152.14.6.1
Red Hat:enterprise_linux:8::baseos	openldap	before 0:2.4.46-10.el8	0:2.4.46-10.el8
Red Hat:enterprise_linux:8::baseos	openldap-clients	before 0:2.4.46-10.el8	0:2.4.46-10.el8
Red Hat:enterprise_linux:8::baseos	openldap-clients-debuginfo	before 0:2.4.46-10.el8	0:2.4.46-10.el8
Red Hat:enterprise_linux:8::baseos	openldap-debuginfo	before 0:2.4.46-10.el8	0:2.4.46-10.el8
Red Hat:enterprise_linux:8::baseos	openldap-debugsource	before 0:2.4.46-10.el8	0:2.4.46-10.el8
Red Hat:enterprise_linux:8::baseos	openldap-devel	before 0:2.4.46-10.el8	0:2.4.46-10.el8
Red Hat:enterprise_linux:8::baseos	openldap-servers-debuginfo	before 0:2.4.46-10.el8	0:2.4.46-10.el8
SUSE:Linux Enterprise Module for Basesystem 15 SP1	openldap2	before 2.4.46-9.34.1	2.4.46-9.34.1

Same product

openldap: all records

Other highest-scoring records for the same primary product.

CVE-2022-29155In OpenLDAP 2.x before 2.5.12 and 2.6.x before 2.6.2, a SQL injection vulnerability exists in the experimental back-sql backend to slapd, vi
58Plan
CVE-2020-36228An integer underflow was discovered in OpenLDAP before 2.4.57 leading to a slapd crash in the Certificate List Exact Assertion processing, r
55Plan
CVE-2020-36221An integer underflow was discovered in OpenLDAP before 2.4.57 leading to slapd crashes in the Certificate Exact Assertion processing, result
55Plan

Published before and after this one in the same product

← EarlierCVE-2014-8182Jan 2, 2020 · An off-by-one error leading to a crash was discovered in openldap 2.4 when processing DNS SRV messages.
31Monitor
← EarlierCVE-2020-12243Apr 28, 2020 · In filter.c in slapd in OpenLDAP before 2.4.50, LDAP search filters with nested boolean expressions can result in denial of service (daemon
31Monitor
Later →CVE-2020-25692Dec 8, 2020 · A NULL pointer dereference was found in OpenLDAP server and was fixed in openldap 2.4.55, during a request for renaming RDNs.
31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
opensuse:openldap2	2.4.46-lp151.10.15.1 · openSUSE:Leap 15.1	Package registry (OSV)
red hat:openldap	0:2.4.46-10.el8 · Red Hat:enterprise_linux:8::baseos	Package registry (OSV)
red hat:openldap-clients	0:2.4.46-10.el8 · Red Hat:enterprise_linux:8::baseos	Package registry (OSV)
red hat:openldap-clients-debuginfo	0:2.4.46-10.el8 · Red Hat:enterprise_linux:8::baseos	Package registry (OSV)
red hat:openldap-debuginfo	0:2.4.46-10.el8 · Red Hat:enterprise_linux:8::baseos	Package registry (OSV)
red hat:openldap-debugsource	0:2.4.46-10.el8 · Red Hat:enterprise_linux:8::baseos	Package registry (OSV)
red hat:openldap-devel	0:2.4.46-10.el8 · Red Hat:enterprise_linux:8::baseos	Package registry (OSV)
red hat:openldap-servers-debuginfo	0:2.4.46-10.el8 · Red Hat:enterprise_linux:8::baseos	Package registry (OSV)
suse:openldap2	2.4.46-9.34.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP1	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

TR-20-905 · Oct 30, 2020(OpenShift Güvenlik Güncellemesi)
TR-20-711 · Sep 14, 2020(OpenLDAP Güvenlik Güncellemesi Yayınladı)

All national notices →

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
A user must open a link or visit a page.
Special conditions such as timing or configuration are required.

If successful

Confidentiality: low · data can be read
Integrity: low · data or configuration can be modified
Availability: none

Attack vector: Network
Attack complexity: High
Privileges required: None
User interaction: Required
Scope: Unchanged
Confidentiality impact: Low
Integrity impact: Low
Availability impact: None

Weakness class (CWE)

CWE-295 · Improper Certificate Validation

CVSS vector

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

nvd-primary

Root cause

A certificate validation error is silently swallowed instead of terminating the connection. Often, code added for a test environment makes its way into production.

The bug in code

The whole CWE-295 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

kotlin

1override fun checkServerTrusted(chain: Array<X509Certificate>, type: String) {
2  // Left empty for the test environment
3}

Fixed

kotlin

1val client = OkHttpClient.Builder()
2  .certificatePinner(
3    CertificatePinner.Builder()
4      .add("api.sirius.example", "sha256/…")
5      .build()
6  ).build()

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

—

Change log

Fix✗ → ✓Sep 28, 2026, 10:46 PM UTC

For records you follow, these changes also arrive as notifications. →

References

lists.opensuse.org/opensuse-security-announce/2020-09/msg00033.html

Show all references (6 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records