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USN-6450-1: OpenSSL vulnerabilities

24 October 2023

Several security issues were fixed in OpenSSL.

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Releases

Packages

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

Details

Tony Battersby discovered that OpenSSL incorrectly handled key and
initialization vector (IV) lengths. This could lead to truncation issues
and result in loss of confidentiality for some symmetric cipher modes.
(CVE-2023-5363)

Juerg Wullschleger discovered that OpenSSL incorrectly handled the AES-SIV
cipher. This could lead to empty data entries being ignored, resulting in
certain applications being misled. This issue only affected Ubuntu 22.04
LTS and Ubuntu 23.04. (CVE-2023-2975)

It was discovered that OpenSSL incorrectly handled checking excessively
long DH keys or parameters. A remote attacker could possibly use this issue
to cause OpenSSL to consume resources, leading to a denial of service. This
issue only affected Ubuntu 22.04 LTS and Ubuntu 23.04. (CVE-2023-3446,
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 23.10
Ubuntu 23.04
Ubuntu 22.04

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

Related notices

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