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Noroxi
NVD / CVE Program· CNA openssl

CVE-2023-0466: Certificate policy check not enabled

Noroxi assessment

Priority: Monitor (action score 22/100)

  • 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: 1.7% (FIRST EPSS); higher than 78.1% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: OpenSSL OpenSSL 3.0.9, 3.1.1; CBL Mariner 1.0 ARM 1.1.1k-15; CBL Mariner 1.0 x64 1.1.1k-15.

Low priority for now. Upgrade to OpenSSL OpenSSL 3.0.9, 3.1.1; CBL Mariner 1.0 ARM 1.1.1k-15; CBL Mariner 1.0 x64 1.1.1k-15 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

The function X509_VERIFY_PARAM_add0_policy() is documented to implicitly enable the certificate policy check when doing certificate verification. However the implementation of the function does not enable the check which allows certificates with invalid or incorrect policies to pass the certificate verification. As suddenly enabling the policy check could break existing deployments it was decided to keep the existing behavior of the X509_VERIFY_PARAM_add0_policy() function. Instead the applications that require OpenSSL to perform certificate policy check need to use X509_VERIFY_PARAM_set1_policies() or explicitly enable the policy check by calling X509_VERIFY_PARAM_set_flags() with the X509_V_FLAG_POLICY_CHECK flag argument. Certificate policy checks are disabled by default in OpenSSL and are not commonly used by applications.

MediumCVSS 5.3 · v3.1—No exploit Fix available
Published
Mar 28, 2023
Updated
Oct 14, 2026
EPSS
1.7% · 78th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
21 / 40 · 5.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 1.7%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
5.3
CNA · openssl
5.3
agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2023-0466

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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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.

VendorProduct
opensslopenssl

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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.

  • openssl openssl1.0.2 and later · before 1.0.2zh
  • openssl openssl1.1.1 and later · before 1.1.1u
  • openssl openssl3.0.0 and later · before 3.0.9
  • openssl openssl3.1.0 and later · before 3.1.1

Versions reported by the vendor

Affected version ranges reported by the assigning authority (openssl). Independent of NVD's CPE analysis and usually ahead of it.

  • OpenSSL OpenSSL

    • 3.1.0 and later · before 3.1.1affected · semver
    • 3.0.0 and later · before 3.0.9affected · semver
    • 1.1.1 and later · before 1.1.1uaffected
    • 1.0.2 and later · before 1.0.2zhaffected

Package-level exposure

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

EcosystemPackageAffected rangeFix
AlmaLinux:9opensslbefore 1:3.0.7-16.el9_21:3.0.7-16.el9_2
AlmaLinux:9openssl-develbefore 1:3.0.7-16.el9_21:3.0.7-16.el9_2
AlmaLinux:9openssl-libsbefore 1:3.0.7-16.el9_21:3.0.7-16.el9_2
AlmaLinux:9openssl-perlbefore 1:3.0.7-16.el9_21:3.0.7-16.el9_2
Alpine:v3.17opensslfrom 1.0.2 · before 3.0.8-r33.0.8-r3
Debian:10opensslbefore 1.1.1n-0+deb10u51.1.1n-0+deb10u5
Debian:11opensslbefore 1.1.1n-0+deb11u51.1.1n-0+deb11u5
Debian:12opensslbefore 3.0.9-13.0.9-1
openSUSE:Leap 15.4openssl-1_0_0before 1.0.2p-150000.3.73.11.0.2p-150000.3.73.1
openSUSE:Leap 15.4openssl-3before 3.0.1-150400.4.23.13.0.1-150400.4.23.1
openSUSE:Leap Micro 5.3openssl-1_1before 1.1.1l-150400.7.34.11.1.1l-150400.7.34.1
openSUSE:Tumbleweedopenssl-1_0_0before 1.0.2u-15.11.0.2u-15.1
openSUSE:Tumbleweedopenssl-1_1before 1.1.1t-3.11.1.1t-3.1
openSUSE:Tumbleweedopenssl-3before 3.1.1-1.13.1.1-1.1
Red Hat:enterprise_linux:9::appstreamopenssl-debuginfobefore 1:3.0.7-16.el9_21:3.0.7-16.el9_2
Red Hat:enterprise_linux:9::appstreamopenssl-debugsourcebefore 1:3.0.7-16.el9_21:3.0.7-16.el9_2
Red Hat:enterprise_linux:9::appstreamopenssl-develbefore 1:3.0.7-16.el9_21:3.0.7-16.el9_2
Red Hat:enterprise_linux:9::appstreamopenssl-libs-debuginfobefore 1:3.0.7-16.el9_21:3.0.7-16.el9_2
Red Hat:enterprise_linux:9::appstreamopenssl-perlbefore 1:3.0.7-16.el9_21:3.0.7-16.el9_2
Red Hat:enterprise_linux:9::baseosopensslbefore 1:3.0.7-16.el9_21:3.0.7-16.el9_2
Red Hat:enterprise_linux:9::baseosopenssl-libsbefore 1:3.0.7-16.el9_21:3.0.7-16.el9_2
Red Hat:jboss_core_services:1::el7jbcs-httpd24-curlbefore 0:8.4.0-2.el7jbcs0:8.4.0-2.el7jbcs
Red Hat:jboss_core_services:1::el7jbcs-httpd24-curl-debuginfobefore 0:8.4.0-2.el7jbcs0:8.4.0-2.el7jbcs
Red Hat:jboss_core_services:1::el7jbcs-httpd24-libcurlbefore 0:8.4.0-2.el7jbcs0:8.4.0-2.el7jbcs

+76

Other highest-scoring records for the same primary product.

  • CVE-2014-0160The (1) TLS and (2) DTLS implementations in OpenSSL 1.0.1 before 1.0.1g do not properly handle Heartbeat Extension packets, which allows remKEV
    90Now
  • CVE-2021-3711SM2 Decryption Buffer Overflow
    65This week
  • CVE-2003-0545Double free vulnerability in OpenSSL 0.9.7 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code
    65This week

Published before and after this one in the same product

  • ← EarlierCVE-2023-0464Mar 22, 2023 · Excessive Resource Usage Verifying X.509 Policy Constraints
    31Monitor
  • ← EarlierCVE-2023-0465Mar 28, 2023 · Invalid certificate policies in leaf certificates are silently ignored
    22Monitor
  • Later →CVE-2023-1255Apr 20, 2023 · Input buffer over-read in AES-XTS implementation on 64 bit ARM
    23Monitor

Remediation

Which version to upgrade to

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

Product / packageFixed versionSource
OpenSSL OpenSSL3.0.9Vendor (CNA)
OpenSSL OpenSSL3.1.1Vendor (CNA)
CBL Mariner 1.0 ARM1.1.1k-15 · opensslMicrosoft (MSRC)
CBL Mariner 1.0 x641.1.1k-15 · opensslMicrosoft (MSRC)
CBL Mariner 2.0 ARM1.0.1-6 · hvloaderMicrosoft (MSRC)
CBL Mariner 2.0 ARM1.1.1k-23 · opensslMicrosoft (MSRC)
CBL Mariner 2.0 x641.0.1-6 · hvloaderMicrosoft (MSRC)
CBL Mariner 2.0 x641.1.1k-23 · opensslMicrosoft (MSRC)
almalinux:openssl1:3.0.7-16.el9_2 · AlmaLinux:9Package registry (OSV)
almalinux:openssl-devel1:3.0.7-16.el9_2 · AlmaLinux:9Package registry (OSV)
almalinux:openssl-libs1:3.0.7-16.el9_2 · AlmaLinux:9Package registry (OSV)
almalinux:openssl-perl1:3.0.7-16.el9_2 · AlmaLinux:9Package registry (OSV)
alpine:openssl3.0.8-r3 · Alpine:v3.17Package registry (OSV)
debian:openssl3.0.9-1 · Debian:12Package registry (OSV)
opensuse:openssl-1_0_01.0.2p-150000.3.73.1 · openSUSE:Leap 15.4Package registry (OSV)
opensuse:openssl-1_11.1.1l-150400.7.34.1 · openSUSE:Leap Micro 5.3Package registry (OSV)
opensuse:openssl-33.0.1-150400.4.23.1 · openSUSE:Leap 15.4Package registry (OSV)
red hat:jws5-tomcat0:9.0.62-19.redhat_00017.1.el7jws · Red Hat:jboss_enterprise_web_server:5.7::el7Package registry (OSV)
red hat:jws5-tomcat-admin-webapps0:9.0.62-19.redhat_00017.1.el7jws · Red Hat:jboss_enterprise_web_server:5.7::el7Package registry (OSV)
red hat:jws5-tomcat-docs-webapp0:9.0.62-19.redhat_00017.1.el7jws · Red Hat:jboss_enterprise_web_server:5.7::el7Package registry (OSV)
red hat:jws5-tomcat-native0:1.2.31-16.redhat_16.el7jws · Red Hat:jboss_enterprise_web_server:5.7::el7Package registry (OSV)
red hat:jws5-tomcat-native-debuginfo0:1.2.31-16.redhat_16.el7jws · Red Hat:jboss_enterprise_web_server:5.7::el7Package registry (OSV)
red hat:openssl1:3.0.7-16.el9_2 · Red Hat:enterprise_linux:9::baseosPackage registry (OSV)
red hat:openssl-debuginfo1:3.0.7-16.el9_2 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:openssl-debugsource1:3.0.7-16.el9_2 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:openssl-devel1:3.0.7-16.el9_2 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:openssl-libs1:3.0.7-16.el9_2 · Red Hat:enterprise_linux:9::baseosPackage registry (OSV)
red hat:openssl-libs-debuginfo1:3.0.7-16.el9_2 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:openssl-perl1:3.0.7-16.el9_2 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
suse:openssl1.0.2j-60.92.1 · SUSE:Linux Enterprise Server 12 SP2-BCLPackage registry (OSV)

+6

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.

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

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).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
low · data or configuration can be modified
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
Low
Availability impact
None

CVSS vector

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

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

Vulnerable

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

Fixed

kotlin
val client = OkHttpClient.Builder()  .certificatePinner(    CertificatePinner.Builder()      .add("api.sirius.example", "sha256/…")      .build()  ).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.

Change log

  1. Fix✗ → ✓

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

References

All records