A libmodbus security update has been released for Ubuntu Linux 18.04 LTS.

USN-5173-1: libmodbus vulnerabilities

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Ubuntu Security Notice USN-5173-1
December 06, 2021

libmodbus vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS

Summary:

libmodbus could be made to crash if it received specially crafted
input.

Software Description:
- libmodbus: Library to send/receive data according to the Modbus protocol

Details:

It was discovered that libmodbus incorrectly handled inputs. An attacker
could possibly use this issue to cause a denial of service or other
unspecified impact.

Update instructions:

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

Ubuntu 18.04 LTS:
libmodbus5 3.0.6-2+deb9u1build0.18.04.1

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

References:
  https://ubuntu.com/security/notices/USN-5173-1
CVE-2019-14462, CVE-2019-14463

Package Information:
  https://launchpad.net/ubuntu/+source/libmodbus/3.0.6-2+deb9u1build0.18.04.1