NNCP vulnerability
Published: Mon, 01 Jun 2026 15:04
Summary
NNCP could allow unintended access to files.
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.
Recommended actions per Ubuntu release
StackPatch playbook auto-generated per release codename and per affected package.
Ubuntu jammy
nncp→8.5.0-1ubuntu0.1+esm3apt_upgradeStandard apt upgrade. Install 8.5.0-1ubuntu0.1+esm3 from the apt repo.
sudo apt-get update sudo apt-get install --only-upgrade -y nncp
Most apt upgrades restart their service automatically. needrestart lists anything else.
nncp→8.5.0-1ubuntu0.1+esm3apt_upgradeStandard apt upgrade. Install 8.5.0-1ubuntu0.1+esm3 from the apt repo.
sudo apt-get update sudo apt-get install --only-upgrade -y nncp
Most apt upgrades restart their service automatically. needrestart lists anything else.
Ubuntu noble
nncp→8.10.0-8ubuntu0.3+esm3apt_upgradeStandard apt upgrade. Install 8.10.0-8ubuntu0.3+esm3 from the apt repo.
sudo apt-get update sudo apt-get install --only-upgrade -y nncp
Most apt upgrades restart their service automatically. needrestart lists anything else.
nncp→8.10.0-8ubuntu0.3+esm3apt_upgradeStandard apt upgrade. Install 8.10.0-8ubuntu0.3+esm3 from the apt repo.
sudo apt-get update sudo apt-get install --only-upgrade -y nncp
Most apt upgrades restart their service automatically. needrestart lists anything else.
Ubuntu questing
nncp→8.11.0-4+deb13u1build0.25.10.1apt_upgradeStandard apt upgrade. Install 8.11.0-4+deb13u1build0.25.10.1 from the apt repo.
sudo apt-get update sudo apt-get install --only-upgrade -y nncp
Most apt upgrades restart their service automatically. needrestart lists anything else.
nncp→8.11.0-4+deb13u1build0.25.10.1apt_upgradeStandard apt upgrade. Install 8.11.0-4+deb13u1build0.25.10.1 from the apt repo.
sudo apt-get update sudo apt-get install --only-upgrade -y nncp
Most apt upgrades restart their service automatically. needrestart lists anything else.
Are YOU affected by USN-8359-1?
5-second check on your actual server. Reads /etc/os-release, uname -r, and dpkg-query; matches against the live USN + Debian Security Tracker feeds; tells you whether USN-8359-1 (and any other live CVE) applies. Anonymous, no signup.
curl https://mindsparkstack.com/scan.sh | bash
StackPatch runs this match against YOUR installed packages every hour
Free 1-server / $99 lifetime founder seat (50 only) / $19+/mo monthly. Indie pricing.