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No exploitation reportedFix available

CVE-2023-0286

No exploitation reported by the sources we read.

  • Published2023-02-08
  • Fixed in4.6.3 · 4.3.16 · 3.11.22 · 3.7.34 · 2.7.11
  • WeaknessCWE-843

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

There is a type confusion vulnerability relating to X.400 address processing inside an X.509 GeneralName. X.400 addresses were parsed as an ASN1_STRING but the public structure definition for GENERAL_NAME incorrectly specified the type of the x400Address field as ASN1_TYPE. This field is subsequently interpreted by the OpenSSL function GENERAL_NAME_cmp as an ASN1_TYPE rather than an ASN1_STRING. When CRL checking is enabled (i.e. the application sets the X509_V_FLAG_CRL_CHECK flag), this vulnerability may allow an attacker to pass arbitrary pointers to a memcmp call, enabling them to read memory contents or enact a denial of service. In most cases, the attack requires the attacker to provide both the certificate chain and CRL, neither of which need to have a valid signature. If the attacker only controls one of these inputs, the other input must already contain an X.400 address as a CRL distribution point, which is uncommon. As such, this vulnerability is most likely to only affect applications which have implemented their own functionality for retrieving CRLs over a network.

Timeline

dates in UTC
  1. 2023-02-0820:15CVE publishedNVD
  2. 2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-0286?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-0286?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Stormshield stormshield network security
BranchAffectedFixed in
4.x≥ 4.4.0, < 4.6.34.6.3
4.x≥ 4.0.0, < 4.3.164.3.16
3.x≥ 3.8.0, < 3.11.223.11.22
3.7≥ 2.8.0, < 3.7.343.7.34
2.7≥ 2.7.0, < 2.7.112.7.11
OpenSSL
BranchAffectedFixed in
3.0≥ 3.0.0, < 3.0.83.0.8
1.1≥ 1.1.1, < 1.1.1t1.1.1t
1.0≥ 1.0.2, < 1.0.2zg1.0.2zg
Stormshield stormshield management center
BranchAffectedFixed in
3.3< 3.3.33.3.3

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • ICSA-25-226-21 CISA1 known affected

    Siemens BFCClient

    BFCClient

  • ICSA-25-065-01 CISA3 products fixed · 3 known affected

    Hitachi Energy PCU400

    PCU400 versions 6.5 K and below · PCU400 versions 9.4.1 and below · PCULogger versions 1.1.0 and below

  • ICSA-24-205-02 CISA8 known affected

    Hitachi Energy AFS/AFR Series Products

    Hitachi Energy AFS650: <=9.1.08 · Hitachi Energy AFS660-C: <=7.1.05 · Hitachi Energy AFS665-B: <=7.1.05 · +5 more

  • ICSA-24-165-11 CISA26 known affected

    Siemens SCALANCE XM-400, XR-500

    SCALANCE XM408-4C (6GK5408-4GP00-2AM2) · SCALANCE XM408-4C (L3 int.) (6GK5408-4GQ00-2AM2) · SCALANCE XM408-8C (6GK5408-8GS00-2AM2) · +23 more

  • ICSA-24-004-02 CISA2 known affected

    Mitsubishi Electric Factory Automation Products

    Mitsubishi Electric GT SoftGOT2000: >=1.275M|<1.290C · Mitsubishi Electric OPC UA Data Collector: <=1.04E

  • ICSA-23-255-01 CISA2 known affected

    Hitachi Energy Lumada APM Edge

    Lumada APM Edge: <= 4.0 · Lumada APM Edge: 6.3

3 more advisories

Full record on NVD

Fix

  1. Update Stormshield stormshield network security to 4.6.3 · 4.3.16 · 3.11.22 · 3.7.34 · 2.7.11
  2. Vendor fix CISA ICSA-25-226-21 · 1 productUpdate to V2.17 or later version. Contact customer support to obtain the update
  3. Vendor fix CISA ICSA-25-065-01 · 1 productIf IEC62351-3 secure for IEC104/DNP3 is used, then update to version 6.6.0 or latest
  4. Vendor fix CISA ICSA-25-065-01 · 1 productIf IEC62351-3 secure for IEC104/DNP3 is used, then update to version 9.4.2 or latest
  5. Vendor fix CISA ICSA-24-205-02 · 1 productAFS650: Update to AFS 650 firmware version 9.1.10
  6. Vendor fix CISA ICSA-24-205-02 · 3 productsAFS660-C, AFS665-B, AFS670-V2: Update to AFS 66x firmware version 7.1.08
  7. Vendor fix CISA ICSA-24-205-02 · 4 productsAFS670/675/677, AFR677: Update to AFS/AFR 67x firmware version 9.1.10

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • CISA-ADPSSVC decisionnone2025-03-06
  • OpenCVESSVC decisionnone—
  • CISA-ADPCVSS 3.17.42025-03-06
  • NVDCVSS 3.17.4read 2026-10-23
  • CISA-ADPweakness (CWE)CWE-8432025-03-06
  • NVDweakness (CWE)CWE-843read 2026-10-23
  • FIRST EPSSEPSS score71.2 %read 2026-10-23

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H
Published
2023-02-08
Last Modified
2026-10-14
NVD status
Modified

Frequently asked questions

What is CVE-2023-0286?

There is a type confusion vulnerability relating to X.400 address processing inside an X.509 GeneralName. X.400 addresses were parsed as an ASN1_STRING but the public structure definition for GENERAL_NAME incorrectly specified the type of the x400Address field as ASN1_TYPE. This field is subsequently interpreted by the OpenSSL function GENERAL_NAME_cmp as an ASN1_TYPE rather than an ASN1_STRING. When CRL checking is enabled (i.e. the application sets the X509_V_FLAG_CRL_CHECK flag), this vulnerability may allow an attacker to pass arbitrary pointers to a memcmp call, enabling them to read memory contents or enact a denial of service. In most cases, the attack requires the attacker to provide both the certificate chain and CRL, neither of which need to have a valid signature. If the attacker only controls one of these inputs, the other input must already contain an X.400 address as a CRL distribution point, which is uncommon. As such, this vulnerability is most likely to only affect applications which have implemented their own functionality for retrieving CRLs over a network.

Is CVE-2023-0286 actively exploited?

Active exploitation of CVE-2023-0286 has not been confirmed. Its EPSS score was 71.2% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-0286?

CVE-2023-0286 has a CVSS v3 base score of 7.4 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H.

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