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USN-6435-1: OpenSSL vulnerabilities

18 October 2023

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

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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)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 18.04
Ubuntu 16.04

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

Related notices

  • USN-6450-1: libssl-doc, openssl, libssl-dev, libssl3
  • USN-6435-2: libssl-doc, openssl, libssl1.1, libssl-dev
  • USN-6709-1: libssl1.0.0, openssl1.0, libssl1.0-dev