CVE-2023-3817 (GCVE-0-2023-3817)
Vulnerability from cvelistv5
Published
2023-07-31 15:34
Modified
2025-05-05 15:53
Severity ?
Summary
Issue summary: Checking excessively long DH keys or parameters may be very slow. Impact summary: Applications that use the functions DH_check(), DH_check_ex() or EVP_PKEY_param_check() 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 this may lead to a Denial of Service. The function DH_check() performs various checks on DH parameters. After fixing CVE-2023-3446 it was discovered that a large q parameter value can also trigger an overly long computation during some of these checks. A correct q value, if present, cannot be larger than the modulus p parameter, thus it is unnecessary to perform these checks if q is larger than p. An application that calls DH_check() and supplies a key or parameters obtained from an untrusted source could be vulnerable to a Denial of Service attack. The function DH_check() is itself called by a number of other OpenSSL functions. An application calling any of those other functions may similarly be affected. The other functions affected by this are DH_check_ex() and EVP_PKEY_param_check(). Also vulnerable are the OpenSSL dhparam and pkeyparam command line applications when using the "-check" option. The OpenSSL SSL/TLS implementation is not affected by this issue. The OpenSSL 3.0 and 3.1 FIPS providers are not affected by this issue.
References
openssl-security@openssl.orghttps://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=6a1eb62c29db6cb5eec707f9338aee00f44e26f5Mailing List, Patch
openssl-security@openssl.orghttps://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=869ad69aadd985c7b8ca6f4e5dd0eb274c9f3644Broken Link
openssl-security@openssl.orghttps://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=9002fd07327a91f35ba6c1307e71fa6fd4409b7fMailing List, Patch
openssl-security@openssl.orghttps://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=91ddeba0f2269b017dc06c46c993a788974b1aa5Mailing List, Patch
openssl-security@openssl.orghttps://www.openssl.org/news/secadv/20230731.txtVendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2023/Jul/43
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2023/07/31/1
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2023/09/22/11
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2023/09/22/9
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2023/11/06/2
af854a3a-2127-422b-91ae-364da2661108https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=6a1eb62c29db6cb5eec707f9338aee00f44e26f5Mailing List, Patch
af854a3a-2127-422b-91ae-364da2661108https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=869ad69aadd985c7b8ca6f4e5dd0eb274c9f3644Broken Link
af854a3a-2127-422b-91ae-364da2661108https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=9002fd07327a91f35ba6c1307e71fa6fd4409b7fMailing List, Patch
af854a3a-2127-422b-91ae-364da2661108https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=91ddeba0f2269b017dc06c46c993a788974b1aa5Mailing List, Patch
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2023/08/msg00019.html
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202402-08
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20230818-0014/
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20231027-0008/
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20240621-0006/
af854a3a-2127-422b-91ae-364da2661108https://www.openssl.org/news/secadv/20230731.txtVendor Advisory
Impacted products
Vendor Product Version
OpenSSL OpenSSL Version: 3.1.0   ≤
Version: 3.0.0   ≤
Version: 1.1.1   < 1.1.1v
Version: 1.0.2   < 1.0.2zi
 Create a notification for this product.
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      "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": "2024-11-21T08:18:08.167",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L\", \"baseScore\": 5.3, \"baseSeverity\": \"MEDIUM\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"LOW\"}, \"exploitabilityScore\": 3.9, \"impactScore\": 1.4}]}",
      "published": "2023-07-31T16:15:10.497",
      "references": "[{\"url\": \"https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=6a1eb62c29db6cb5eec707f9338aee00f44e26f5\", \"source\": \"openssl-security@openssl.org\", \"tags\": [\"Mailing List\", \"Patch\"]}, {\"url\": \"https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=869ad69aadd985c7b8ca6f4e5dd0eb274c9f3644\", \"source\": \"openssl-security@openssl.org\", \"tags\": [\"Broken Link\"]}, {\"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\": [\"Mailing List\", \"Patch\"]}, {\"url\": \"https://www.openssl.org/news/secadv/20230731.txt\", \"source\": \"openssl-security@openssl.org\", \"tags\": [\"Vendor Advisory\"]}, {\"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\"}, {\"url\": \"https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=6a1eb62c29db6cb5eec707f9338aee00f44e26f5\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Mailing List\", \"Patch\"]}, {\"url\": \"https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=869ad69aadd985c7b8ca6f4e5dd0eb274c9f3644\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Broken Link\"]}, {\"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\", \"tags\": [\"Mailing List\", \"Patch\"]}, {\"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\"}, {\"url\": \"https://www.openssl.org/news/secadv/20230731.txt\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Vendor Advisory\"]}]",
      "sourceIdentifier": "openssl-security@openssl.org",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"openssl-security@openssl.org\", \"type\": \"Secondary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-606\"}]}, {\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-834\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-3817\",\"sourceIdentifier\":\"openssl-security@openssl.org\",\"published\":\"2023-07-31T16:15:10.497\",\"lastModified\":\"2025-05-05T16:15:47.343\",\"vulnStatus\":\"Modified\",\"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 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\"https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=869ad69aadd985c7b8ca6f4e5dd0eb274c9f3644\", \"name\": \"1.0.2zi patch (premium)\", \"tags\": [\"patch\"]}], \"x_generator\": {\"engine\": \"Vulnogram 0.1.0-dev\"}, \"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.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"Issue summary: Checking excessively long DH keys or parameters may be very slow.\u003cbr\u003e\u003cbr\u003eImpact summary: Applications that use the functions DH_check(), DH_check_ex()\u003cbr\u003eor EVP_PKEY_param_check() to check a DH key or DH parameters may experience long\u003cbr\u003edelays. 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