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OpenAdvisories
Medium USN-6435-2 2 CVEs

openssl vulnerabilities

Published Oct 25, 2023 · Updated Apr 27, 2026

Ecosystem: Ubuntu

Summary

USN-6435-1 fixed vulnerabilities in OpenSSL. This update
provides the corresponding updates for Ubuntu 20.04 LTS.

Original advisory details:

It was discovered that OpenSSL incorrectly handled excessively large
Diffie-Hellman parameters. An attacker could possibly use this issue
to cause a denial of service. (CVE-2023-3446)

Bernd Edlinger discovered that OpenSSL incorrectly handled excessively
large Diffie-Hellman parameters. An attacker could possibly use this
issue to cause a denial of service. (CVE-2023-3817)

Fixed packages 1

ReleasePackageFixed in
Ubuntu · 20.04 LTS 20.04:LTS openssl 1.1.1f-1ubuntu2.20

Vulnerabilities 2

  • Medium 5.3
    CVE-2023-3446

    Excessive time spent checking DH keys and parameters

    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 k…

    OpenSSL OpenSSL openssl nodejs Debian Ubuntu Azure Linux Alpine Wolfi
  • Medium 5.3
    CVE-2023-3817

    Excessive time spent checking DH q parameter 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 k…

    OpenSSL OpenSSL openssl nodejs Debian Ubuntu Azure Linux Alpine Wolfi

References

  • report
    https://ubuntu.com/security/CVE-2023-3446
  • report
    https://ubuntu.com/security/CVE-2023-3817