CVE-2023-3446: Excessive time spent checking DH keys and parameters
Vendor fix available · Affected: OpenSSL · Exploitation: possible (1 to 10%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 93% of scored CVEs
DescriptionCVE.org
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. 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.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- OpenSSL · OpenSSLfrom 3.1.0 before 3.1.2; from 3.0.0 before 3.0.10; from 1.1.1 before 1.1.1v; from 1.0.2 before 1.0.2zi
On the Atlas
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CoverageNo articles yet
No CyberSIXT article names CVE-2023-3446 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.
References
- NVD entrynvd.nist.gov
- CVE recordcve.org
- Weakness CWE-606cwe.mitre.org
- Vendor advisoryopenssl.org
- Patchgit.openssl.org
- Patchgit.openssl.org
- Patchgit.openssl.org
- Patchgit.openssl.org
- openwall.com/lists/oss-security/2023/07/19/4openwall.com
- openwall.com/lists/oss-security/2023/07/19/5openwall.com
- openwall.com/lists/oss-security/2023/07/19/6openwall.com
- openwall.com/lists/oss-security/2023/07/31/1openwall.com
- security.netapp.com/advisory/ntap-20230803-0011security.netapp.com
- lists.debian.org/debian-lts-announce/2023/08/msg00019.htmllists.debian.org
- security.gentoo.org/glsa/202402-08security.gentoo.org
10 more references are in the CVE record.