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[USN-8359-1] NNCP vulnerability

Posted on 01 June 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8359-1
June 01, 2026

nncp vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 25.10
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS

Summary:

NNCP could allow unintended access to files.

Software Description:
- nncp: package facilitating secure store-and-forward file and mail exchange

Details:

It was discovered that NNCP did not properly sanitize file paths
in packet data during file requesting and file saving operations. A
remote attacker could possibly use this issue to read or write
arbitrary files outside of the intended directory.

Update instructions:

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

Ubuntu 25.10
nncp 8.11.0-4+deb13u1build0.25.10.1

Ubuntu 24.04 LTS
nncp 8.10.0-8ubuntu0.3+esm3
Available with Ubuntu Pro

Ubuntu 22.04 LTS
nncp 8.5.0-1ubuntu0.1+esm3
Available with Ubuntu Pro

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

References:
https://ubuntu.com/security/notices/USN-8359-1
CVE-2025-60020

Package Information:
https://launchpad.net/ubuntu/+source/nncp/8.11.0-4+deb13u1build0.25.10.1

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