Excessive time spent checking DH keys and parameters

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2023-3446
StatePUBLISHED
Assigneropenssl
Source PriorityCVE Program / NVD first with legacy fallback
Published2023-07-19 12:15:10 UTC
Updated2026-10-14 21:17:16 UTC
DescriptionIssue 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. One of those checks confirms that the modulus ('p' parameter) is not too large. Trying to use a very large modulus is slow and OpenSSL will not normally use a modulus which is over 10,000 bits in length. However the DH_check() function checks numerous aspects of the key or parameters that have been supplied. Some of those checks use the supplied modulus value even if it has already been found to be too large. An application that calls DH_check() and supplies a key or parameters obtained from an untrusted source could be vulernable 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.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS: 0.065310000 probability, percentile 0.936910000 (date 2026-10-14)

Problem Types: CWE-606 | CWE-1333 | CWE-606 CWE-606 Unchecked Input for Loop Condition

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
3.1ADPDECLARED5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Openssl Openssl 1.0.2 - All All
Application Openssl Openssl 1.1.1 - All All
Application Openssl Openssl 3.0.0 - All All
Application Openssl Openssl 3.1.0 - All All
Application Openssl Openssl 3.1.1 - All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA OpenSSL OpenSSL affected 3.1.0 3.1.2 semver Not specified
CNA OpenSSL OpenSSL affected 3.0.0 3.0.10 semver Not specified
CNA OpenSSL OpenSSL affected 1.1.1 1.1.1v custom Not specified
CNA OpenSSL OpenSSL affected 1.0.2 1.0.2zi custom Not specified
ADP Siemens SIDIS Prime affected V4.0.700 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 TM MFP - GNU/Linux Subsystem affected V1.1 custom Not specified
ADP Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified

References

ReferenceSourceLinkTags
cert-portal.siemens.com/productcert/html/ssa-398330.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
oss-security - OpenSSL Security Advisory af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
oss-security - Re: OpenSSL Security Advisory af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
www.openssl.org/news/secadv/20230719.txt af854a3a-2127-422b-91ae-364da2661108 www.openssl.org Vendor Advisory
oss-security - OpenSSL Security Advisory af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
cert-portal.siemens.com/productcert/html/ssa-556635.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
oss-security - Re: OpenSSL Security Advisory af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
cert-portal.siemens.com/productcert/html/ssa-769027.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.openssl.org Git - openssl.git/commitdiff af854a3a-2127-422b-91ae-364da2661108 git.openssl.org Mailing List, Patch, Vendor Advisory
git.openssl.org Git - openssl.git/commitdiff af854a3a-2127-422b-91ae-364da2661108 git.openssl.org Mailing List, Patch, Vendor Advisory
OpenSSL: Multiple Vulnerabilities (GLSA 202402-08) — Gentoo security af854a3a-2127-422b-91ae-364da2661108 security.gentoo.org
cert-portal.siemens.com/productcert/html/ssa-915275.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
[SECURITY] [DLA 3530-1] openssl security update af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
CVE-2023-3446 OpenSSL Vulnerability in NetApp Products | NetApp Product Security af854a3a-2127-422b-91ae-364da2661108 security.netapp.com
git.openssl.org Git - openssl.git/commitdiff af854a3a-2127-422b-91ae-364da2661108 git.openssl.org Broken Link, Vendor Advisory
cert-portal.siemens.com/productcert/html/ssa-341067.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
www.openwall.com/lists/oss-security/2024/05/16/1 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
cert-portal.siemens.com/productcert/html/ssa-277137.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
cert-portal.siemens.com/productcert/html/ssa-794697.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.openssl.org Git - openssl.git/commitdiff af854a3a-2127-422b-91ae-364da2661108 git.openssl.org Mailing List, Patch, Vendor Advisory
cert-portal.siemens.com/productcert/html/ssa-099606.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
cert-portal.siemens.com/productcert/html/ssa-943925.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: OSSfuzz (en)

CNA: Matt Caswell (en)

Legacy QID Mappings

  • 161251 Oracle Enterprise Linux Security Update for Open Secure Sockets Layer (OpenSSL) (ELSA-2023-7877)
  • 161287 Oracle Enterprise Linux Security Update for Open Secure Sockets Layer (OpenSSL) (ELSA-2024-12056)
  • 161366 Oracle Enterprise Linux Security Update for edk2 (ELSA-2024-0888)
  • 199838 Ubuntu Security Notification for Open Secure Sockets Layer (OpenSSL) Vulnerabilities (USN-6435-1)
  • 199860 Ubuntu Security Notification for Open Secure Sockets Layer (OpenSSL) Vulnerabilities (USN-6450-1)
  • 199865 Ubuntu Security Notification for Open Secure Sockets Layer (OpenSSL) Vulnerabilities (USN-6435-2)
  • 200215 Ubuntu Security Notification for Open Secure Sockets Layer (OpenSSL) Vulnerabilities (USN-6709-1)
  • 242553 Red Hat Update for JBoss Core Services (RHSA-2023:7625)
  • 242632 Red Hat Update for Open Secure Sockets Layer (OpenSSL) (RHSA-2023:7877)
  • 242687 Red Hat Update for Open Secure Sockets Layer (OpenSSL) (RHSA-2024:0154)
  • 242696 Red Hat Update for Open Secure Sockets Layer (OpenSSL) (RHSA-2024:0208)
  • 242858 Red Hat Update for edk2 (RHSA-2024:0408)
  • 242981 Red Hat Update for edk2 (RHSA-2024:0888)
  • 243098 Red Hat Update for edk2 (RHSA-2024:1415)
  • 296105 Oracle Solaris 11.4 Support Repository Update (SRU) 63.157.1 Missing (CPUOCT2023)
  • 330149 IBM Advanced Interactive eXecutive (AIX) Open Secure Sockets Layer (OpenSSL) Multiple Vulnerabilities (openssl_advisory39)
  • 355881 Amazon Linux Security Advisory for Open Secure Sockets Layer (OpenSSL) : ALAS2023-2023-306
  • 356346 Amazon Linux Security Advisory for Open Secure Sockets Layer (OpenSSL) : AL2012-2023-449
  • 356356 Amazon Linux Security Advisory for Open Secure Sockets Layer (OpenSSL) : ALAS-2023-1843
  • 356509 Amazon Linux Security Advisory for openssl-snapsafe : ALAS2OPENSSL-SNAPSAFE-2023-003
  • 357333 Amazon Linux Security Advisory for edk2 : ALAS2-2024-2502
  • 379050 Splunk Enterprise Multiple Vulnerabilities (SVD-2023-1104,SVD-2023-1105)
  • 379095 Splunk Universal Forwarder Multiple Vulnerabilities (SVD-2023-1107)
  • 379630 Alibaba Cloud Linux Security Update for Open Secure Sockets Layer (OpenSSL) (ALINUX3-SA-2024:0047)
  • 503045 Alpine Linux Security Update for Open Secure Sockets Layer (OpenSSL)
  • 503046 Alpine Linux Security Update for Open Secure Sockets Layer (OpenSSL)3
  • 503053 Alpine Linux Security Update for Open Secure Sockets Layer (OpenSSL)
  • 503054 Alpine Linux Security Update for Open Secure Sockets Layer (OpenSSL)1.1-compat
  • 503123 Alpine Linux Security Update for openssl
  • 505787 Alpine Linux Security Update for openssl1.1-compat
  • 505908 Alpine Linux Security Update for openssl
  • 6000160 Debian Security Update for Open Secure Sockets Layer (OpenSSL) (DLA 3530-1)
  • 673365 EulerOS Security Update for Open Secure Sockets Layer (OpenSSL) (EulerOS-SA-2023-3141)
  • 673405 EulerOS Security Update for openssl098e (EulerOS-SA-2024-1156)
  • 673596 EulerOS Security Update for compat-openssl10 (EulerOS-SA-2023-3117)
  • 673684 EulerOS Security Update for shim (EulerOS-SA-2024-1164)
  • 673724 EulerOS Security Update for shim (EulerOS-SA-2024-1299)
  • 673771 EulerOS Security Update for Open Secure Sockets Layer (OpenSSL) (EulerOS-SA-2023-2847)
  • 673782 EulerOS Security Update for Open Secure Sockets Layer (OpenSSL) (EulerOS-SA-2023-2864)
  • 673804 EulerOS Security Update for Open Secure Sockets Layer (OpenSSL) (EulerOS-SA-2023-2902)
  • 673807 EulerOS Security Update for Open Secure Sockets Layer (OpenSSL) (EulerOS-SA-2023-2883)
  • 673858 EulerOS Security Update for openssl111d (EulerOS-SA-2024-1157)
  • 673915 EulerOS Security Update for Open Secure Sockets Layer (OpenSSL) (EulerOS-SA-2024-1155)
  • 673941 EulerOS Security Update for shim (EulerOS-SA-2023-2909)
  • 674010 EulerOS Security Update for Open Secure Sockets Layer (OpenSSL) (EulerOS-SA-2023-2793)
  • 674034 EulerOS Security Update for shim (EulerOS-SA-2023-2890)
  • 674045 EulerOS Security Update for shim (EulerOS-SA-2023-3044)
  • 674048 EulerOS Security Update for Open Secure Sockets Layer (OpenSSL) (EulerOS-SA-2023-2817)
  • 674049 EulerOS Security Update for shim (EulerOS-SA-2023-3021)
  • 674091 EulerOS Security Update for shim (EulerOS-SA-2023-3232)
  • 674115 EulerOS Security Update for shim (EulerOS-SA-2023-3197)
  • 710857 Gentoo Linux Open Secure Sockets Layer (OpenSSL) Multiple Vulnerabilities (GLSA 202402-08)
  • 754207 SUSE Enterprise Linux Security Update for Open Secure Sockets Layer (OpenSSL)-1_1 (SUSE-SU-2023:2961-1)
  • 754213 SUSE Enterprise Linux Security Update for Open Secure Sockets Layer (OpenSSL)-1_1 (SUSE-SU-2023:2964-1)
  • 754220 SUSE Enterprise Linux Security Update for openssl-1_0_0 (SUSE-SU-2023:3012-1)
  • 754229 SUSE Enterprise Linux Security Update for compat-openssl098 (SUSE-SU-2023:3096-1)
  • 754231 SUSE Enterprise Linux Security Update for Open Secure Sockets Layer (OpenSSL)-1_0_0 (SUSE-SU-2023:3093-1)
  • 754245 SUSE Enterprise Linux Security Update for Open Secure Sockets Layer (OpenSSL)-1_1 (SUSE-SU-2023:3179-1)
  • 941507 AlmaLinux Security Update for Open Secure Sockets Layer (OpenSSL) (ALSA-2023:7877)
  • 941587 AlmaLinux Security Update for edk2 (ALSA-2024:0888)

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report