Vulnerability-Lookup

OESA-2024-1187 (CVE-2023-0464)

Vulnerability from osv_openeuler – Published: 2024-02-23 11:06 – Updated: 2026-08-06 11:06 – Source website

Summary

shim security update

Details

Initial UEFI bootloader that handles chaining to a trusted full \ bootloader under secure boot environments.

Security Fix(es):

A security vulnerability has been identified in all supported versions

of OpenSSL related to the verification of X.509 certificate chains that include policy constraints. Attackers may be able to exploit this vulnerability by creating a malicious certificate chain that triggers exponential use of computational resources, leading to a denial-of-service (DoS) attack on affected systems.

Policy processing is disabled by default but can be enabled by passing the -policy' argument to the command line utilities or by calling theX509_VERIFY_PARAM_set1_policies()' function.(CVE-2023-0464)

Severity

7.5 (High)


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

References

URL

Type

	https://www.openeuler.org/en/security/safety-bull…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2023-0464	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "shim-15.6-16.oe2203sp1.aarch64.rpm"
        ],
        "noarch": [
          "shim-debuginfo-15.6-16.oe2203sp1.noarch.rpm",
          "shim-debugsource-15.6-16.oe2203sp1.noarch.rpm"
        ],
        "src": [
          "shim-15.6-16.oe2203sp1.src.rpm"
        ],
        "x86_64": [
          "shim-15.6-16.oe2203sp1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:22.03-LTS-SP1",
        "name": "shim",
        "purl": "pkg:rpm/openEuler/shim\u0026distro=openEuler-22.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "15.6-16.oe2203sp1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "High"
  },
  "details": "Initial UEFI bootloader that handles chaining to a trusted full \\ bootloader under secure boot environments.\r\n\r\nSecurity Fix(es):\r\n\r\nA security vulnerability has been identified in all supported versions\r\n\r\nof OpenSSL related to the verification of X.509 certificate chains\nthat include policy constraints.  Attackers may be able to exploit this\nvulnerability by creating a malicious certificate chain that triggers\nexponential use of computational resources, leading to a denial-of-service\n(DoS) attack on affected systems.\r\n\r\nPolicy processing is disabled by default but can be enabled by passing\nthe `-policy\u0026apos; argument to the command line utilities or by calling the\n`X509_VERIFY_PARAM_set1_policies()\u0026apos; function.(CVE-2023-0464)",
  "id": "OESA-2024-1187",
  "modified": "2026-08-06T11:06:38Z",
  "published": "2024-02-23T11:06:38Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2024-1187"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-0464"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "shim security update",
  "upstream": [
    "CVE-2023-0464"
  ]
}

CVE-2023-0464 (GCVE-0-2023-0464)

Vulnerability from cvelistv5 – Published: 2023-03-22 16:36 – Updated: 2025-05-05 16:08

Title

Excessive Resource Usage Verifying X.509 Policy Constraints

Summary

A security vulnerability has been identified in all supported versions of OpenSSL related to the verification of X.509 certificate chains that include policy constraints. Attackers may be able to exploit this vulnerability by creating a malicious certificate chain that triggers exponential use of computational resources, leading to a denial-of-service (DoS) attack on affected systems. Policy processing is disabled by default but can be enabled by passing the `-policy' argument to the command line utilities or by calling the `X509_VERIFY_PARAM_set1_policies()' function.

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-04-23 13:26 UTC

CWE

inefficient algorithmic complexity
CWE-295 - Improper Certificate Validation

Assigner

openssl mitre root

References

11 references

URL	Tags
https://www.openssl.org/news/secadv/20230322.txt	vendor-advisory
https://git.openssl.org/gitweb/?p=openssl.git;a=c…	patch
https://git.openssl.org/gitweb/?p=openssl.git;a=c…	patch
https://git.openssl.org/gitweb/?p=openssl.git;a=c…	patch
https://git.openssl.org/gitweb/?p=openssl.git;a=c…	patch
https://www.couchbase.com/alerts/
https://www.debian.org/security/2023/dsa-5417
https://lists.debian.org/debian-lts-announce/2023…
https://security.gentoo.org/glsa/202402-08
https://security.netapp.com/advisory/ntap-2024062…
https://security.netapp.com/advisory/ntap-2023040…

Impacted products

1 product

Vendor	Product	Version
OpenSSL	OpenSSL	Affected: 3.1.0 , < 3.1.1 (semver) Affected: 3.0.0 , < 3.0.9 (semver) Affected: 1.1.1 , < 1.1.1u (custom) Affected: 1.0.2 , < 1.0.2zh (custom)

Date Public

2023-03-21 00:00

Credits

David Benjamin (Google) Dr Paul Dale

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.