CVE-2018-8020 (GCVE-0-2018-8020)
Vulnerability from cvelistv5 – Published: 2018-07-31 13:00 – Updated: 2024-09-17 01:20
VLAI
EPSS
VEX
Summary
Apache Tomcat Native 1.2.0 to 1.2.16 and 1.1.23 to 1.1.34 has a flaw that does not properly check OCSP pre-produced responses, which are lists (multiple entries) of certificate statuses. Subsequently, revoked client certificates may not be properly identified, allowing for users to authenticate with revoked certificates to connections that require mutual TLS. Users not using OCSP checks are not affected by this vulnerability.
Severity
7.4 (High)
CWE
- Security Constraint Bypass
Assigner
References
13 references
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Apache Software Foundation | Apache Tomcat Native |
Affected:
1.2.0 to 1.2.16
Affected: 1.1.23 to 1.1.34 |
guessed |
Date Public
2018-07-31 00:00
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"references": "[{\"url\": \"http://mail-archives.us.apache.org/mod_mbox/www-announce/201807.mbox/%3C20180721101944.GA45239%40minotaur.apache.org%3E\", \"source\": \"security@apache.org\"}, {\"url\": \"http://www.securityfocus.com/bid/104934\", \"source\": \"security@apache.org\", \"tags\": [\"Third Party Advisory\", \"VDB Entry\"]}, {\"url\": \"http://www.securitytracker.com/id/1041507\", \"source\": \"security@apache.org\", \"tags\": [\"Third Party Advisory\", \"VDB Entry\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2018:2469\", \"source\": \"security@apache.org\", \"tags\": [\"Third Party Advisory\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2018:2470\", \"source\": \"security@apache.org\", \"tags\": [\"Third Party Advisory\"]}, {\"url\": \"https://lists.apache.org/thread.html/ba661b0edd913b39ff129a32d855620dd861883ade05fd88a8ce517d%40%3Cdev.tomcat.apache.org%3E\", \"source\": \"security@apache.org\"}, {\"url\": \"https://lists.apache.org/thread.html/f8e0814e11c7f21f42224b6de111cb3f5e5ab5c15b78924c516d4ec2%40%3Cdev.tomcat.apache.org%3E\", \"source\": \"security@apache.org\"}, {\"url\": \"https://lists.apache.org/thread.html/r831e0548fad736a98140d0b3b7dc575af0c50faea0b266434ba813cc%40%3Cdev.rocketmq.apache.org%3E\", \"source\": \"security@apache.org\"}, {\"url\": \"https://lists.apache.org/thread.html/rb25b42f666d2cac5e6e6b3f771faf60d1f1aa58073dcdd8db14edf8a%40%3Cdev.rocketmq.apache.org%3E\", \"source\": \"security@apache.org\"}, {\"url\": \"https://lists.apache.org/thread.html/rcddf723a4b4117f8ed6042e9ac25e8c5110a617bab77694b61b14833%40%3Cdev.rocketmq.apache.org%3E\", \"source\": \"security@apache.org\"}, {\"url\": \"https://lists.apache.org/thread.html/re3b72cbb13e1dfe85c4a06959a3b6ca6d939b407ecca80db12b54220%40%3Cdev.tomcat.apache.org%3E\", \"source\": \"security@apache.org\"}, {\"url\": \"https://lists.apache.org/thread.html/rf8e8c091182b45daa50d3557cad9b10bb4198e3f08cf8f1c66a1b08d%40%3Cdev.tomcat.apache.org%3E\", \"source\": \"security@apache.org\"}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2018/08/msg00023.html\", \"source\": \"security@apache.org\", \"tags\": [\"Mailing List\", \"Third Party Advisory\"]}, {\"url\": \"http://mail-archives.us.apache.org/mod_mbox/www-announce/201807.mbox/%3C20180721101944.GA45239%40minotaur.apache.org%3E\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"http://www.securityfocus.com/bid/104934\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Third Party Advisory\", \"VDB Entry\"]}, {\"url\": \"http://www.securitytracker.com/id/1041507\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Third Party Advisory\", \"VDB Entry\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2018:2469\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Third Party Advisory\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2018:2470\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Third Party Advisory\"]}, {\"url\": \"https://lists.apache.org/thread.html/ba661b0edd913b39ff129a32d855620dd861883ade05fd88a8ce517d%40%3Cdev.tomcat.apache.org%3E\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://lists.apache.org/thread.html/f8e0814e11c7f21f42224b6de111cb3f5e5ab5c15b78924c516d4ec2%40%3Cdev.tomcat.apache.org%3E\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://lists.apache.org/thread.html/r831e0548fad736a98140d0b3b7dc575af0c50faea0b266434ba813cc%40%3Cdev.rocketmq.apache.org%3E\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://lists.apache.org/thread.html/rb25b42f666d2cac5e6e6b3f771faf60d1f1aa58073dcdd8db14edf8a%40%3Cdev.rocketmq.apache.org%3E\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://lists.apache.org/thread.html/rcddf723a4b4117f8ed6042e9ac25e8c5110a617bab77694b61b14833%40%3Cdev.rocketmq.apache.org%3E\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://lists.apache.org/thread.html/re3b72cbb13e1dfe85c4a06959a3b6ca6d939b407ecca80db12b54220%40%3Cdev.tomcat.apache.org%3E\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://lists.apache.org/thread.html/rf8e8c091182b45daa50d3557cad9b10bb4198e3f08cf8f1c66a1b08d%40%3Cdev.tomcat.apache.org%3E\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2018/08/msg00023.html\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Mailing List\", \"Third Party Advisory\"]}]",
"sourceIdentifier": "security@apache.org",
"vulnStatus": "Modified",
"weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-295\"}]}]"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2018-8020\",\"sourceIdentifier\":\"security@apache.org\",\"published\":\"2018-07-31T13:29:00.827\",\"lastModified\":\"2024-11-21T04:13:06.637\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Apache Tomcat Native 1.2.0 to 1.2.16 and 1.1.23 to 1.1.34 has a flaw that does not properly check OCSP pre-produced responses, which are lists (multiple entries) of certificate statuses. Subsequently, revoked client certificates may not be properly identified, allowing for users to authenticate with revoked certificates to connections that require mutual TLS. Users not using OCSP checks are not affected by this vulnerability.\"},{\"lang\":\"es\",\"value\":\"Apache Tomcat Native desde la versi\u00f3n 1.2.0 hasta la 1.2.16 y desde la versi\u00f3n 1.1.23 hasta la 1.1.34 tiene un error por el cual no comprueba las respuestas OCSP preproducidas, las cuales son listas (m\u00faltiples entradas) de estados de certificados. Subsecuentemente, los certificados de cliente revocados no se identifican correctamente, lo que permite que los usuarios se autentiquen con certificados revocados en conexiones que requieren TLS mutuo. Los usuarios que no emplean comprobaciones OCSP no se han visto afectados por esta vulnerabilidad.\"}],\"metrics\":{\"cvssMetricV30\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.0\",\"vectorString\":\"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N\",\"baseScore\":7.4,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.2,\"impactScore\":5.2}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:M/Au:N/C:N/I:P/A:N\",\"baseScore\":4.3,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"MEDIUM\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"PARTIAL\",\"availabilityImpact\":\"NONE\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":8.6,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-295\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"C11E6FB0-C8C0-4527-9AA0-CB9B316F8F43\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:tomcat_native:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"1.1.23\",\"versionEndIncluding\":\"1.1.34\",\"matchCriteriaId\":\"A362CAA5-51E6-45FC-AF1F-92D7D427FA3B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:tomcat_native:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"1.2.0\",\"versionEndIncluding\":\"1.2.16\",\"matchCriteriaId\":\"9C0691E6-BCC0-4EA8-B916-AA3711CDC6C2\"}]}]}],\"references\":[{\"url\":\"http://mail-archives.us.apache.org/mod_mbox/www-announce/201807.mbox/%3C20180721101944.GA45239%40minotaur.apache.org%3E\",\"source\":\"security@apache.org\"},{\"url\":\"http://www.securityfocus.com/bid/104934\",\"source\":\"security@apache.org\",\"tags\":[\"Third Party Advisory\",\"VDB Entry\"]},{\"url\":\"http://www.securitytracker.com/id/1041507\",\"source\":\"security@apache.org\",\"tags\":[\"Third Party Advisory\",\"VDB Entry\"]},{\"url\":\"https://access.redhat.com/errata/RHSA-2018:2469\",\"source\":\"security@apache.org\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://access.redhat.com/errata/RHSA-2018:2470\",\"source\":\"security@apache.org\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://lists.apache.org/thread.html/ba661b0edd913b39ff129a32d855620dd861883ade05fd88a8ce517d%40%3Cdev.tomcat.apache.org%3E\",\"source\":\"security@apache.org\"},{\"url\":\"https://lists.apache.org/thread.html/f8e0814e11c7f21f42224b6de111cb3f5e5ab5c15b78924c516d4ec2%40%3Cdev.tomcat.apache.org%3E\",\"source\":\"security@apache.org\"},{\"url\":\"https://lists.apache.org/thread.html/r831e0548fad736a98140d0b3b7dc575af0c50faea0b266434ba813cc%40%3Cdev.rocketmq.apache.org%3E\",\"source\":\"security@apache.org\"},{\"url\":\"https://lists.apache.org/thread.html/rb25b42f666d2cac5e6e6b3f771faf60d1f1aa58073dcdd8db14edf8a%40%3Cdev.rocketmq.apache.org%3E\",\"source\":\"security@apache.org\"},{\"url\":\"https://lists.apache.org/thread.html/rcddf723a4b4117f8ed6042e9ac25e8c5110a617bab77694b61b14833%40%3Cdev.rocketmq.apache.org%3E\",\"source\":\"security@apache.org\"},{\"url\":\"https://lists.apache.org/thread.html/re3b72cbb13e1dfe85c4a06959a3b6ca6d939b407ecca80db12b54220%40%3Cdev.tomcat.apache.org%3E\",\"source\":\"security@apache.org\"},{\"url\":\"https://lists.apache.org/thread.html/rf8e8c091182b45daa50d3557cad9b10bb4198e3f08cf8f1c66a1b08d%40%3Cdev.tomcat.apache.org%3E\",\"source\":\"security@apache.org\"},{\"url\":\"https://lists.debian.org/debian-lts-announce/2018/08/msg00023.html\",\"source\":\"security@apache.org\",\"tags\":[\"Mailing 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Advisory\"]},{\"url\":\"https://lists.apache.org/thread.html/ba661b0edd913b39ff129a32d855620dd861883ade05fd88a8ce517d%40%3Cdev.tomcat.apache.org%3E\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.apache.org/thread.html/f8e0814e11c7f21f42224b6de111cb3f5e5ab5c15b78924c516d4ec2%40%3Cdev.tomcat.apache.org%3E\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.apache.org/thread.html/r831e0548fad736a98140d0b3b7dc575af0c50faea0b266434ba813cc%40%3Cdev.rocketmq.apache.org%3E\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.apache.org/thread.html/rb25b42f666d2cac5e6e6b3f771faf60d1f1aa58073dcdd8db14edf8a%40%3Cdev.rocketmq.apache.org%3E\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.apache.org/thread.html/rcddf723a4b4117f8ed6042e9ac25e8c5110a617bab77694b61b14833%40%3Cdev.rocketmq.apache.org%3E\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.apache.org/thread.html/re3b72cbb13e1dfe85c4a06959a3b6ca6d939b407ecca80db12b54220%40%3Cdev.tomcat.apache.org%3E\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.apache.org/thread.html/rf8e8c091182b45daa50d3557cad9b10bb4198e3f08cf8f1c66a1b08d%40%3Cdev.tomcat.apache.org%3E\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.debian.org/debian-lts-announce/2018/08/msg00023.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]}]}}",
"redhat_vex": {
"aggregate_severity": "Important",
"current_release_date": "2025-11-21T16:00:13+00:00",
"cve": "CVE-2018-8020",
"id": "CVE-2018-8020",
"initial_release_date": "2018-07-21T00:00:00+00:00",
"product_status:fixed": "61",
"product_status:known_affected": "1",
"product_status:known_not_affected": "2",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "tomcat-native: Mishandled OCSP responses can allow clients to authenticate with revoked certificates",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2018/cve-2018-8020.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "important",
"current_release_date": "2026-08-31T08:47:07Z",
"cve": "CVE-2018-8020",
"id": "CVE-2018-8020",
"initial_release_date": "2023-02-15T04:29:19Z",
"product_status:known_not_affected": "174",
"product_status:recommended": "16",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2018-8020",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2018-8020.json",
"version": "14"
}
}
}
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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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