1. Ubuntu Security Notices
  2. USN-6435-1

USN-6435-1: OpenSSL vulnerabilities

Publication date

18 October 2023

Overview

OpenSSL could be made to consume resources and cause long delays if it processed certain input.

Releases

Packages

  • openssl - Secure Socket Layer (SSL) cryptographic library and tools

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)

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)

Update instructions

After a standard system update you need to reboot your computer to make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
18.04 bionic libssl1.1 –  1.1.1-1ubuntu2.1~18.04.23+esm3  
openssl –  1.1.1-1ubuntu2.1~18.04.23+esm3  
16.04 xenial libssl1.0.0 –  1.0.2g-1ubuntu4.20+esm10  
openssl –  1.0.2g-1ubuntu4.20+esm10  

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References

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