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Vulnerability in Net::EasyTCP Exposes Sensitive Data

Vulnerability in Net::EasyTCP Exposes Sensitive Data

First seen 3 Nov 2026, 22:45 UTC • •
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ThreatCluster AI
ThreatCluster •November 3, 2026 at 22:46 UTC
  • •Net::EasyTCP vulnerability allows key prediction via Perl rand() function.
  • •Affected Ubuntu versions include 24.04, 22.04, 20.04, 18.04, and 16.04 LTS.
  • •Users should update to patched versions to mitigate risks.

A serious vulnerability has been identified in Net::EasyTCP, a Perl library used for creating TCP/IP clients and servers. The flaw arises from the use of the Perl rand() function for generating encryption keys, which can be predicted by attackers if a strong randomization module is not present. This vulnerability affects multiple Ubuntu versions, including 24.04 LTS, 22.04 LTS, 20.04 LTS, 18.04 LTS, and 16.04 LTS. Users are advised to update to specific patched versions to mitigate the risk. The issue could allow unauthorized access to sensitive information over the network. A standard system update will apply the necessary changes. No has been reported at this time, but the potential for exploitation exists. The vulnerability is cataloged as USN-8985-1.

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Timeline

2026-11-03
Vulnerability disclosed
Ubuntu announced a serious vulnerability in Net::EasyTCP affecting multiple LTS versions.
Ubuntu
2026-11-03
Patch released
Ubuntu provided updates for affected versions to address the vulnerability.
Linuxsecurity

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Common questions

What specific versions of Ubuntu are affected?
The affected versions include Ubuntu 24.04, 22.04, 20.04, 18.04, and 16.04 LTS.
Is there any active exploitation of this vulnerability?
No active exploitation has been reported at this time, but the vulnerability poses a risk.
How can I protect my systems?
Update to the patched versions of libnet-easytcp-perl as specified in the advisories.