{
"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": "2024-10-14T14:55:48.907Z"
},
"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.
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."
}
],
"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": "CWE-606",
"description": "CWE-606 Unchecked Input for Loop Condition",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"orgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5",
"shortName": "openssl",
"dateUpdated": "2024-10-14T14:55:48.907Z"
},
"references": [
{
"name": "OpenSSL Advisory",
"tags": [
"vendor-advisory"
],
"url": "https://www.openssl.org/news/secadv/20230731.txt"
},
{
"name": "3.1.2 git commit",
"tags": [
"patch"
],
"url": "https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=6a1eb62c29db6cb5eec707f9338aee00f44e26f5"
},
{
"name": "3.0.10 git commit",
"tags": [
"patch"
],
"url": "https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=9002fd07327a91f35ba6c1307e71fa6fd4409b7f"
},
{
"name": "1.1.1v git commit",
"tags": [
"patch"
],
"url": "https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=91ddeba0f2269b017dc06c46c993a788974b1aa5"
},
{
"name": "1.0.2zi patch (premium)",
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"url": "https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=869ad69aadd985c7b8ca6f4e5dd0eb274c9f3644"
}
],
"source": {
"discovery": "UNKNOWN"
},
"title": "Excessive time spent checking DH q parameter value",
"x_generator": {
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"dateUpdated": "2024-08-02T07:08:50.496Z"
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"title": "CVE Program Container",
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"url": "https://www.openssl.org/news/secadv/20230731.txt"
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{
"url": "http://seclists.org/fulldisclosure/2023/Jul/43",
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"url": "http://www.openwall.com/lists/oss-security/2023/07/31/1",
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{
"url": "https://lists.debian.org/debian-lts-announce/2023/08/msg00019.html",
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{
"url": "https://security.netapp.com/advisory/ntap-20230818-0014/",
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