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             AUSCERT External Security Bulletin Redistribution

                               ESB-2023.3070
                    USN-6097-1: Linux PTP vulnerability
                                30 May 2023

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Linux PTP
Publisher:         Ubuntu
Operating System:  Ubuntu
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-3570  

Original Bulletin: 
   https://ubuntu.com/security/notices/USN-6097-1

Comment: CVSS (Max):  8.8 CVE-2021-3570 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
         CVSS Source: NVD
         Calculator:  https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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USN-6097-1: Linux PTP vulnerability

29 May 2023

Linux PTP could be made to crash, run arbitrary code, or expose sensitive
information if it received specially crafted input.

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

Releases

  o Ubuntu 20.04 LTS
  o Ubuntu 18.04 ESM
  o Ubuntu 16.04 ESM

Packages

  o linuxptp - Precision Time Protocol (PTP, IEEE1588) implementation for Linux

Details

It was discovered that Linux PTP did not properly perform a length check
when forwarding a PTP message between ports. A remote attacker could
possibly use this issue to access sensitive information, execute
arbitrary code, or cause a denial of service.

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 20.04

  o linuxptp - 1.9.2-1ubuntu0.1

Ubuntu 18.04

  o linuxptp - 1.8-1ubuntu0.1

Ubuntu 16.04

  o linuxptp - 1.6-1ubuntu0.1~esm1
    Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References

  o CVE-2021-3570

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===========================================================================
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