CVE-2023-0464 (GCVE-0-2023-0464)
Vulnerability from cvelistv5 – Published: 2023-03-22 16:36 – Updated: 2025-05-05 16:08
VLAI
EPSS
VEX
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)
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
References
11 references
Impacted products
Date Public
2023-03-21 00:00
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\"00000000-0000-4000-9000-000000000000\", \"value\": \"David Benjamin (Google)\"}, {\"lang\": \"en\", \"type\": \"remediation developer\", \"user\": \"00000000-0000-4000-9000-000000000000\", \"value\": \"Dr Paul Dale\"}], \"metrics\": [{\"other\": {\"type\": \"https://www.openssl.org/policies/secpolicy.html\", \"content\": {\"text\": \"Low\"}}, \"format\": \"other\"}], \"affected\": [{\"vendor\": \"OpenSSL\", \"product\": \"OpenSSL\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.1.0\", \"lessThan\": \"3.1.1\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"3.0.0\", \"lessThan\": \"3.0.9\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"1.1.1\", \"lessThan\": \"1.1.1u\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"1.0.2\", \"lessThan\": \"1.0.2zh\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unaffected\"}], \"datePublic\": \"2023-03-21T00:00:00.000Z\", \"references\": [{\"url\": \"https://www.openssl.org/news/secadv/20230322.txt\", \"name\": \"OpenSSL Advisory\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=2017771e2db3e2b96f89bbe8766c3209f6a99545\", \"name\": \"3.1.1 git commit\", \"tags\": [\"patch\"]}, {\"url\": \"https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=959c59c7a0164117e7f8366466a32bb1f8d77ff1\", \"name\": \"3.0.9 git commit\", \"tags\": [\"patch\"]}, {\"url\": \"https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=879f7080d7e141f415c79eaa3a8ac4a3dad0348b\", \"name\": \"1.1.1u git commit\", \"tags\": [\"patch\"]}, {\"url\": \"https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=2dcd4f1e3115f38cefa43e3efbe9b801c27e642e\", \"name\": \"1.0.2zh patch (premium)\", \"tags\": [\"patch\"]}, {\"url\": \"https://www.couchbase.com/alerts/\"}, {\"url\": \"https://www.debian.org/security/2023/dsa-5417\"}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2023/06/msg00011.html\"}, {\"url\": \"https://security.gentoo.org/glsa/202402-08\"}, {\"url\": \"https://security.netapp.com/advisory/ntap-20240621-0006/\"}], \"x_generator\": {\"engine\": \"Vulnogram 0.1.0-dev\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"A security vulnerability has been identified in all supported versions\\n\\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.\\n\\nPolicy processing is disabled by default but can be enabled by passing\\nthe `-policy\u0027 argument to the command line utilities or by calling the\\n`X509_VERIFY_PARAM_set1_policies()\u0027 function.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"A security vulnerability has been identified in all supported versions\u003cbr\u003e\u003cbr\u003eof OpenSSL related to the verification of X.509 certificate chains\u003cbr\u003ethat include policy constraints. Attackers may be able to exploit this\u003cbr\u003evulnerability by creating a malicious certificate chain that triggers\u003cbr\u003eexponential use of computational resources, leading to a denial-of-service\u003cbr\u003e(DoS) attack on affected systems.\u003cbr\u003e\u003cbr\u003ePolicy processing is disabled by default but can be enabled by passing\u003cbr\u003ethe `-policy\u0027 argument to the command line utilities or by calling the\u003cbr\u003e`X509_VERIFY_PARAM_set1_policies()\u0027 function.\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"description\": \"inefficient algorithmic complexity\"}]}], \"providerMetadata\": {\"orgId\": \"3a12439a-ef3a-4c79-92e6-6081a721f1e5\", \"shortName\": \"openssl\", \"dateUpdated\": \"2024-06-21T19:07:07.428Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2023-0464\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-05T16:08:48.783Z\", \"dateReserved\": \"2023-01-24T13:50:25.835Z\", \"assignerOrgId\": \"3a12439a-ef3a-4c79-92e6-6081a721f1e5\", \"datePublished\": \"2023-03-22T16:36:47.383Z\", \"assignerShortName\": \"openssl\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
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.
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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.
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.
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