USN-8985-1: Net::EasyTCP vulnerability

Publication date

3 November 2026

Overview

Net::EasyTCP could be made to expose sensitive information over the network.


Packages

Details

It was discovered that Net::EasyTCP used the built-in Perl rand() function
to generate encryption keys when no strong randomization module was
present. An attacker could possibly use this issue to predict the keys and
obtain sensitive information.

It was discovered that Net::EasyTCP used the built-in Perl rand() function
to generate encryption keys when no strong randomization module was
present. An attacker could possibly use this issue to predict the keys and
obtain sensitive information.

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
24.04 LTS noble libnet-easytcp-perl –  0.26-6+deb11u1build0.24.04.1
22.04 LTS jammy libnet-easytcp-perl –  0.26-4ubuntu0.22.04.1~esm1  
20.04 LTS focal libnet-easytcp-perl –  0.26-4ubuntu0.20.04.1~esm1  
18.04 LTS bionic libnet-easytcp-perl –  0.26-4ubuntu0.18.04.1~esm1  
16.04 LTS xenial libnet-easytcp-perl –  0.26-3ubuntu0.1~esm1

Reduce your security exposure

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