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Noroxi
CVE-2023-0401· NVD / CVE Program· CNA openssl

NULL dereference during PKCS7 data verification

Noroxi assessment

Priority: Monitor (action score 31/100)

  • 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: 1.8% (FIRST EPSS); higher than 78.9% 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.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: OpenSSL OpenSSL 3.0.8.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to OpenSSL OpenSSL 3.0.8 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

A NULL pointer can be dereferenced when signatures are being verified on PKCS7 signed or signedAndEnveloped data. In case the hash algorithm used for the signature is known to the OpenSSL library but the implementation of the hash algorithm is not available the digest initialization will fail. There is a missing check for the return value from the initialization function which later leads to invalid usage of the digest API most likely leading to a crash. The unavailability of an algorithm can be caused by using FIPS enabled configuration of providers or more commonly by not loading the legacy provider. PKCS7 data is processed by the SMIME library calls and also by the time stamp (TS) library calls. The TLS implementation in OpenSSL does not call these functions however third party applications would be affected if they call these functions to verify signatures on untrusted data.

HighCVSS 7.5 · v3.1—No exploit Fix available
Published
Feb 8, 2023
Updated
Jun 17, 2026
EPSS
1.8% · 78th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 1.8%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

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-2023-0401

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
stormshieldstormshield management center

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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 openssl3.0.0 and later · up to 3.0.7 inclusive
  • stormshield stormshield management centerbefore 3.3.3

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

    • 3.0.0 and later · before 3.0.8affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
AlmaLinux:9opensslbefore 1:3.0.1-47.el9_11:3.0.1-47.el9_1
AlmaLinux:9openssl-develbefore 1:3.0.1-47.el9_11:3.0.1-47.el9_1
AlmaLinux:9openssl-libsbefore 1:3.0.1-47.el9_11:3.0.1-47.el9_1
AlmaLinux:9openssl-perlbefore 1:3.0.1-47.el9_11:3.0.1-47.el9_1
Alpine:v3.15openssl3before 3.0.8-r03.0.8-r0
Alpine:v3.17opensslfrom 3.0.0 · before 3.0.8-r03.0.8-r0
crates.ioopenssl-srcfrom 300.0.0 · before 300.0.12300.0.12
Debian:12opensslbefore 3.0.8-13.0.8-1
openSUSE:Leap 15.4openssl-3before 3.0.1-150400.4.17.13.0.1-150400.4.17.1
openSUSE:Tumbleweedopenssl-3before 3.0.8-1.13.0.8-1.1
Red Hat:enterprise_linux:9::appstreamopenssl-debuginfobefore 1:3.0.1-47.el9_11:3.0.1-47.el9_1
Red Hat:enterprise_linux:9::appstreamopenssl-debugsourcebefore 1:3.0.1-47.el9_11:3.0.1-47.el9_1
Red Hat:enterprise_linux:9::appstreamopenssl-develbefore 1:3.0.1-47.el9_11:3.0.1-47.el9_1
Red Hat:enterprise_linux:9::appstreamopenssl-libs-debuginfobefore 1:3.0.1-47.el9_11:3.0.1-47.el9_1
Red Hat:enterprise_linux:9::appstreamopenssl-perlbefore 1:3.0.1-47.el9_11:3.0.1-47.el9_1
Red Hat:enterprise_linux:9::baseosopensslbefore 1:3.0.1-47.el9_11:3.0.1-47.el9_1
Red Hat:enterprise_linux:9::baseosopenssl-libsbefore 1:3.0.1-47.el9_11:3.0.1-47.el9_1
Red Hat:rhel_eus:9.0::appstreamopenssl-debuginfobefore 1:3.0.1-46.el9_01:3.0.1-46.el9_0
Red Hat:rhel_eus:9.0::appstreamopenssl-debugsourcebefore 1:3.0.1-46.el9_01:3.0.1-46.el9_0
Red Hat:rhel_eus:9.0::appstreamopenssl-develbefore 1:3.0.1-46.el9_01:3.0.1-46.el9_0
Red Hat:rhel_eus:9.0::appstreamopenssl-libs-debuginfobefore 1:3.0.1-46.el9_01:3.0.1-46.el9_0
Red Hat:rhel_eus:9.0::appstreamopenssl-perlbefore 1:3.0.1-46.el9_01:3.0.1-46.el9_0
Red Hat:rhel_eus:9.0::baseosopensslbefore 1:3.0.1-46.el9_01:3.0.1-46.el9_0
Red Hat:rhel_eus:9.0::baseosopenssl-libsbefore 1:3.0.1-46.el9_01:3.0.1-46.el9_0

+2

Same product

openssl: all records

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-2023-0216Feb 8, 2023 · Invalid pointer dereference in d2i_PKCS7 functions
    31Monitor
  • ← EarlierCVE-2023-0217Feb 8, 2023 · NULL dereference validating DSA public key
    31Monitor
  • Later →CVE-2022-4304Feb 8, 2023 · Timing Oracle in RSA Decryption
    30Monitor

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 OpenSSL3.0.8Vendor (CNA)
almalinux:openssl1:3.0.1-47.el9_1 · AlmaLinux:9Package registry (OSV)
almalinux:openssl-devel1:3.0.1-47.el9_1 · AlmaLinux:9Package registry (OSV)
almalinux:openssl-libs1:3.0.1-47.el9_1 · AlmaLinux:9Package registry (OSV)
almalinux:openssl-perl1:3.0.1-47.el9_1 · AlmaLinux:9Package registry (OSV)
alpine:openssl3.0.8-r0 · Alpine:v3.17Package registry (OSV)
alpine:openssl33.0.8-r0 · Alpine:v3.15Package registry (OSV)
crates.io:openssl-src300.0.12Package registry (OSV)
debian:openssl3.0.8-1 · Debian:12Package registry (OSV)
opensuse:openssl-33.0.1-150400.4.17.1 · openSUSE:Leap 15.4Package registry (OSV)
red hat:openssl1:3.0.1-47.el9_1 · Red Hat:enterprise_linux:9::baseosPackage registry (OSV)
red hat:openssl-debuginfo1:3.0.1-47.el9_1 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:openssl-debugsource1:3.0.1-47.el9_1 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:openssl-devel1:3.0.1-47.el9_1 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:openssl-libs1:3.0.1-47.el9_1 · Red Hat:enterprise_linux:9::baseosPackage registry (OSV)
red hat:openssl-libs-debuginfo1:3.0.1-47.el9_1 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:openssl-perl1:3.0.1-47.el9_1 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
rocky linux:openssl1:3.0.1-47.el9_1 · Rocky Linux:9Package registry (OSV)
suse:openssl-33.0.1-150400.4.17.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP4Package 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.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

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

Credits

All researchers

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).

National notice (Türkiye Cybersecurity Directorate / USOM)

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

All national notices →

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
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-476 · NULL Pointer Dereference

CVSS vector

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

nvd-primary

Attack context

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

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

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

References

Show all references (3 more)

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

All records