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             AUSCERT External Security Bulletin Redistribution

                    USN-5845-2: OpenSSL vulnerabilities
                              8 February 2023


        AusCERT Security Bulletin Summary

Product:           OpenSSL
Publisher:         Ubuntu
Operating System:  Ubuntu
Resolution:        Patch/Upgrade
CVE Names:         CVE-2023-0286 CVE-2023-0215 

Original Bulletin: 

Comment: CVSS (Max):  7.4 CVE-2023-0286 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H)
         CVSS Source: Red Hat
         Calculator:  https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H

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USN-5845-2: OpenSSL vulnerabilities

7 February 2023

Several security issues were fixed in OpenSSL.

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


  o Ubuntu 16.04 ESM
  o Ubuntu 14.04 ESM


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


USN-5845-1 fixed several vulnerabilities in OpenSSL. This update provides
the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.

Original advisory details:

David Benjamin discovered that OpenSSL incorrectly handled X.400 address
processing. A remote attacker could possibly use this issue to read
arbitrary memory contents or cause OpenSSL to crash, resulting in a denial
of service. ( CVE-2023-0286 )

Octavio Galland and Marcel Bohme discovered that OpenSSL incorrectly
handled streaming ASN.1 data. A remote attacker could use this issue to
cause OpenSSL to crash, resulting in a denial of service, or possibly
execute arbitrary code. ( CVE-2023-0215 )

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

Ubuntu 16.04

  o libssl1.0.0 - 1.0.2g-1ubuntu4.20+esm6
    Available with Ubuntu Pro

Ubuntu 14.04

  o libssl1.0.0 - 1.0.1f-1ubuntu2.27+esm6
    Available with Ubuntu Pro

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


  o CVE-2023-0286
  o CVE-2023-0215

Related notices

  o USN-5844-1 : openssl, libssl3, libssl1.1, libssl-dev, libssl-doc
  o USN-5845-1 : libssl1.0-dev, openssl1.0, libssl1.0.0

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