{"dataType": "CVE_RECORD", "cveMetadata": {"cveId": "CVE-2023-3817", "assignerOrgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5", "state": "PUBLISHED", "assignerShortName": "openssl", "dateReserved": "2023-07-21T08:47:25.638Z", "datePublished": "2023-07-31T15:34:13.627Z", "dateUpdated": "2025-05-05T15:53:49.014Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "OpenSSL", "vendor": "OpenSSL", "versions": [{"lessThan": "3.1.2", "status": "affected", "version": "3.1.0", "versionType": "semver"}, {"lessThan": "3.0.10", "status": "affected", "version": "3.0.0", "versionType": "semver"}, {"lessThan": "1.1.1v", "status": "affected", "version": "1.1.1", "versionType": "custom"}, {"lessThan": "1.0.2zi", "status": "affected", "version": "1.0.2", "versionType": "custom"}]}], "credits": [{"lang": "en", "type": "finder", "user": "00000000-0000-4000-9000-000000000000", "value": "Bernd Edlinger"}, {"lang": "en", "type": "remediation developer", "user": "00000000-0000-4000-9000-000000000000", "value": "Tomas Mraz"}], "datePublic": "2023-07-31T00:00:00.000Z", "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "Issue summary: Checking excessively long DH keys or parameters may be very slow.<br><br>Impact summary: Applications that use the functions DH_check(), DH_check_ex()<br>or EVP_PKEY_param_check() to check a DH key or DH parameters may experience long<br>delays. Where the key or parameters that are being checked have been obtained<br>from an untrusted source this may lead to a Denial of Service.<br><br>The function DH_check() performs various checks on DH parameters. After fixing<br>CVE-2023-3446 it was discovered that a large q parameter value can also trigger<br>an overly long computation during some of these checks. A correct q value,<br>if present, cannot be larger than the modulus p parameter, thus it is<br>unnecessary to perform these checks if q is larger than p.<br><br>An application that calls DH_check() and supplies a key or parameters obtained<br>from an untrusted source could be vulnerable to a Denial of Service attack.<br><br>The function DH_check() is itself called by a number of other OpenSSL functions.<br>An application calling any of those other functions may similarly be affected.<br>The other functions affected by this are DH_check_ex() and<br>EVP_PKEY_param_check().<br><br>Also vulnerable are the OpenSSL dhparam and pkeyparam command line applications<br>when using the \"-check\" option.<br><br>The OpenSSL SSL/TLS implementation is not affected by this issue.<br><br>The OpenSSL 3.0 and 3.1 FIPS providers are not affected by this issue."}], "value": "Issue summary: Checking excessively long DH keys or parameters may be very slow.\n\nImpact summary: Applications that use the functions DH_check(), DH_check_ex()\nor EVP_PKEY_param_check() to check a DH key or DH parameters may experience long\ndelays. Where the key or parameters that are being checked have been obtained\nfrom an untrusted source this may lead to a Denial of Service.\n\nThe function DH_check() performs various checks on DH parameters. After fixing\nCVE-2023-3446 it was discovered that a large q parameter value can also trigger\nan overly long computation during some of these checks. A correct q value,\nif present, cannot be larger than the modulus p parameter, thus it is\nunnecessary to perform these checks if q is larger than p.\n\nAn application that calls DH_check() and supplies a key or parameters obtained\nfrom an untrusted source could be vulnerable to a Denial of Service attack.\n\nThe function DH_check() is itself called by a number of other OpenSSL functions.\nAn application calling any of those other functions may similarly be affected.\nThe other functions affected by this are DH_check_ex() and\nEVP_PKEY_param_check().\n\nAlso vulnerable are the OpenSSL dhparam and pkeyparam command line applications\nwhen using the \"-check\" option.\n\nThe OpenSSL SSL/TLS implementation is not affected by this issue.\n\nThe OpenSSL 3.0 and 3.1 FIPS providers are not affected by this issue."}], "metrics": [{"format": "other", "other": {"content": {"text": "Low"}, "type": "https://www.openssl.org/policies/secpolicy.html"}}], "problemTypes": [{"descriptions": [{"cweId": 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Where the key or parameters that are being checked have been obtained\nfrom an untrusted source this may lead to a Denial of Service.\n\nThe function DH_check() performs various checks on DH parameters. After fixing\nCVE-2023-3446 it was discovered that a large q parameter value can also trigger\nan overly long computation during some of these checks. A correct q value,\nif present, cannot be larger than the modulus p parameter, thus it is\nunnecessary to perform these checks if q is larger than p.\n\nAn application that calls DH_check() and supplies a key or parameters obtained\nfrom an untrusted source could be vulnerable to a Denial of Service attack.\n\nThe function DH_check() is itself called by a number of other OpenSSL functions.\nAn application calling any of those other functions may similarly be affected.\nThe other functions affected by this are DH_check_ex() and\nEVP_PKEY_param_check().\n\nAlso vulnerable are the OpenSSL dhparam and pkeyparam command line applications\nwhen using the \"-check\" option.\n\nThe OpenSSL SSL/TLS implementation is not affected by this issue.\n\nThe OpenSSL 3.0 and 3.1 FIPS providers are not affected by this issue.", "supportingMedia": [{"type": "text/html", "value": "Issue summary: Checking excessively long DH keys or parameters may be very slow.<br><br>Impact summary: Applications that use the functions DH_check(), DH_check_ex()<br>or EVP_PKEY_param_check() to check a DH key or DH parameters may experience long<br>delays. Where the key or parameters that are being checked have been obtained<br>from an untrusted source this may lead to a Denial of Service.<br><br>The function DH_check() performs various checks on DH parameters. After fixing<br>CVE-2023-3446 it was discovered that a large q parameter value can also trigger<br>an overly long computation during some of these checks. 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"vulnerable": true}, {"criteria": "cpe:2.3:a:openssl:openssl:1.1.1t:*:*:*:*:*:*:*", "matchCriteriaId": "6F1DE6C9-DCAF-4896-912D-443A32B918F6", "vulnerable": true}, {"criteria": "cpe:2.3:a:openssl:openssl:1.1.1u:*:*:*:*:*:*:*", "matchCriteriaId": "C5C8A0C3-BAAF-43D7-B782-5EA17539D7EF", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Issue summary: Checking excessively long DH keys or parameters may be very slow.\n\nImpact summary: Applications that use the functions DH_check(), DH_check_ex()\nor EVP_PKEY_param_check() to check a DH key or DH parameters may experience long\ndelays. Where the key or parameters that are being checked have been obtained\nfrom an untrusted source this may lead to a Denial of Service.\n\nThe function DH_check() performs various checks on DH parameters. After fixing\nCVE-2023-3446 it was discovered that a large q parameter value can also trigger\nan overly long computation during some of these checks. A correct q value,\nif present, cannot be larger than the modulus p parameter, thus it is\nunnecessary to perform these checks if q is larger than p.\n\nAn application that calls DH_check() and supplies a key or parameters obtained\nfrom an untrusted source could be vulnerable to a Denial of Service attack.\n\nThe function DH_check() is itself called by a number of other OpenSSL functions.\nAn application calling any of those other functions may similarly be affected.\nThe other functions affected by this are DH_check_ex() and\nEVP_PKEY_param_check().\n\nAlso vulnerable are the OpenSSL dhparam and pkeyparam command line applications\nwhen using the \"-check\" option.\n\nThe OpenSSL SSL/TLS implementation is not affected by this issue.\n\nThe OpenSSL 3.0 and 3.1 FIPS providers are not affected by this issue."}], "id": "CVE-2023-3817", "lastModified": "2025-05-05T16:15:47.343", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2023-07-31T16:15:10.497", "references": [{"source": "openssl-security@openssl.org", "tags": ["Mailing List", "Patch"], "url": "https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=6a1eb62c29db6cb5eec707f9338aee00f44e26f5"}, {"source": "openssl-security@openssl.org", "tags": ["Broken Link"], "url": "https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=869ad69aadd985c7b8ca6f4e5dd0eb274c9f3644"}, {"source": "openssl-security@openssl.org", "tags": ["Mailing List", "Patch"], "url": "https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=9002fd07327a91f35ba6c1307e71fa6fd4409b7f"}, {"source": "openssl-security@openssl.org", "tags": ["Mailing List", "Patch"], "url": "https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=91ddeba0f2269b017dc06c46c993a788974b1aa5"}, {"source": "openssl-security@openssl.org", "tags": ["Vendor Advisory"], "url": "https://www.openssl.org/news/secadv/20230731.txt"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://seclists.org/fulldisclosure/2023/Jul/43"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2023/07/31/1"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2023/09/22/11"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2023/09/22/9"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2023/11/06/2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Patch"], "url": "https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=6a1eb62c29db6cb5eec707f9338aee00f44e26f5"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Broken Link"], "url": "https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=869ad69aadd985c7b8ca6f4e5dd0eb274c9f3644"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Patch"], "url": "https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=9002fd07327a91f35ba6c1307e71fa6fd4409b7f"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Patch"], "url": "https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=91ddeba0f2269b017dc06c46c993a788974b1aa5"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2023/08/msg00019.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://security.gentoo.org/glsa/202402-08"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://security.netapp.com/advisory/ntap-20230818-0014/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://security.netapp.com/advisory/ntap-20231027-0008/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://security.netapp.com/advisory/ntap-20240621-0006/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://www.openssl.org/news/secadv/20230731.txt"}], "sourceIdentifier": "openssl-security@openssl.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-606"}], "source": "openssl-security@openssl.org", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-834"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2023:7625", "cpe": "cpe:/a:redhat:jboss_core_services:1::el8", "package": "jbcs-httpd24-openssl-1:1.1.1k-16.el8jbcs", "product_name": "JBoss Core Services for RHEL 8", "release_date": "2023-12-07T00:00:00Z"}, {"advisory": "RHSA-2023:7625", "cpe": "cpe:/a:redhat:jboss_core_services:1::el7", "package": "jbcs-httpd24-openssl-1:1.1.1k-16.el7jbcs", "product_name": "JBoss Core Services on RHEL 7", "release_date": "2023-12-07T00:00:00Z"}, {"advisory": "RHSA-2023:7877", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "openssl-1:1.1.1k-12.el8_9", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2023-12-19T00:00:00Z"}, {"advisory": "RHSA-2024:0208", "cpe": "cpe:/o:redhat:rhel_eus:8.6", "package": "openssl-1:1.1.1k-12.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Extended Update Support", "release_date": "2024-01-11T00:00:00Z"}, {"advisory": "RHSA-2024:0154", "cpe": "cpe:/o:redhat:rhel_eus:8.8", "package": "openssl-1:1.1.1k-12.el8_8", "product_name": "Red Hat Enterprise Linux 8.8 Extended Update Support", "release_date": "2024-01-10T00:00:00Z"}, {"advisory": "RHSA-2024:2447", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "openssl-1:3.0.7-27.el9", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-04-30T00:00:00Z"}, {"advisory": "RHSA-2024:2447", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "openssl-1:3.0.7-27.el9", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-04-30T00:00:00Z"}, {"advisory": "RHSA-2023:7623", "cpe": "cpe:/a:redhat:jboss_enterprise_web_server:5.7", "package": "jbcs-httpd24-openssl", "product_name": "Red Hat JBoss Web Server 5", "release_date": "2023-12-07T00:00:00Z"}, {"advisory": "RHSA-2023:7622", "cpe": "cpe:/a:redhat:jboss_enterprise_web_server:5.7::el7", "package": "jws5-tomcat-native-0:1.2.31-16.redhat_16.el7jws", "product_name": "Red Hat JBoss Web Server 5.7 on RHEL 7", "release_date": "2023-12-07T00:00:00Z"}, {"advisory": "RHSA-2023:7622", "cpe": "cpe:/a:redhat:jboss_enterprise_web_server:5.7::el8", "package": "jws5-tomcat-native-0:1.2.31-16.redhat_16.el8jws", "product_name": "Red Hat JBoss Web Server 5.7 on RHEL 8", "release_date": "2023-12-07T00:00:00Z"}, {"advisory": "RHSA-2023:7622", "cpe": "cpe:/a:redhat:jboss_enterprise_web_server:5.7::el9", "package": "jws5-tomcat-native-0:1.2.31-16.redhat_16.el9jws", "product_name": "Red Hat JBoss Web Server 5.7 on RHEL 9", "release_date": "2023-12-07T00:00:00Z"}, {"advisory": "RHSA-2023:5931", "cpe": "cpe:/a:redhat:satellite:6.13::el8", "package": "puppet-agent-0:7.26.0-3.el8sat", "product_name": "Red Hat Satellite 6.13 for RHEL 8", "release_date": "2023-10-19T00:00:00Z"}, {"advisory": "RHSA-2023:5931", "cpe": "cpe:/a:redhat:satellite_capsule:6.13::el8", "package": "puppet-agent-0:7.26.0-3.el8sat", "product_name": "Red Hat Satellite 6.13 for RHEL 8", "release_date": "2023-10-19T00:00:00Z"}, {"advisory": "RHSA-2023:7626", "cpe": "cpe:/a:redhat:jboss_core_services:1", "package": "jbcs-httpd24-openssl", "product_name": "Text-Only JBCS", "release_date": "2023-12-07T00:00:00Z"}], "bugzilla": {"description": "OpenSSL: Excessive time spent checking DH q parameter value", "id": "2227852", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2227852"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "status": "verified"}, "details": ["Issue summary: Checking excessively long DH keys or parameters may be very slow.\nImpact summary: Applications that use the functions DH_check(), DH_check_ex()\nor EVP_PKEY_param_check() to check a DH key or DH parameters may experience long\ndelays. Where the key or parameters that are being checked have been obtained\nfrom an untrusted source this may lead to a Denial of Service.\nThe function DH_check() performs various checks on DH parameters. After fixing\nCVE-2023-3446 it was discovered that a large q parameter value can also trigger\nan overly long computation during some of these checks. A correct q value,\nif present, cannot be larger than the modulus p parameter, thus it is\nunnecessary to perform these checks if q is larger than p.\nAn application that calls DH_check() and supplies a key or parameters obtained\nfrom an untrusted source could be vulnerable to a Denial of Service attack.\nThe function DH_check() is itself called by a number of other OpenSSL functions.\nAn application calling any of those other functions may similarly be affected.\nThe other functions affected by this are DH_check_ex() and\nEVP_PKEY_param_check().\nAlso vulnerable are the OpenSSL dhparam and pkeyparam command line applications\nwhen using the \"-check\" option.\nThe OpenSSL SSL/TLS implementation is not affected by this issue.\nThe OpenSSL 3.0 and 3.1 FIPS providers are not affected by this issue.", "A vulnerability was found in OpenSSL. This security issue occurs because the applications that use the DH_check(), DH_check_ex(), or EVP_PKEY_param_check() functions to check a DH key or DH parameters may experience long delays. Where the key or parameters that are being checked have been obtained from an untrusted source may lead to a denial of service."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2023-3817", "package_state": [{"cpe": "cpe:/a:redhat:cryostat:2", "fix_state": "Not affected", "package_name": "openssl", "product_name": "Cryostat 2"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "openssl", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "openssl", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "compat-openssl10", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "mingw-openssl", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "openssl-ibmpkcs11", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "openssl-pkcs11", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "compat-openssl11", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "openssl-ibmca", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "openssl-pkcs11", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:jboss_core_services:1", "fix_state": "Affected", "package_name": "jbcs-httpd24-openssl-chil", "product_name": "Red Hat JBoss Core Services"}, {"cpe": "cpe:/a:redhat:jboss_core_services:1", "fix_state": "Affected", "package_name": "jbcs-httpd24-openssl-pkcs11", "product_name": "Red Hat JBoss Core Services"}], "public_date": "2023-07-31T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-3817\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-3817\nhttps://www.openssl.org/news/secadv/20230731.txt"], "statement": "This vulnerability in OpenSSL is considered low severity primarily because it requires specific conditions to be exploited and has limited impact. While excessive computation time during DH parameter checks could potentially lead to denial of service (DoS) attacks, the likelihood of successful exploitation is relatively low. Additionally, the vulnerability mainly affects applications that use certain OpenSSL functions for DH parameter validation, rather than the broader SSL/TLS implementation.", "threat_severity": "Low"}

{}