CVE-2024-5300 Affecting snapd package, versions <2.67.1+20.04ubuntu1~esm3


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.1% (1st percentile)

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  • Snyk IDSNYK-UBUNTU2004-SNAPD-18068895
  • published21 Jul 2026
  • disclosed21 Jul 2026

Introduced: 21 Jul 2026

NewCVE-2024-5300  (opens in a new tab)

How to fix?

Upgrade Ubuntu:20.04 snapd to version 2.67.1+20.04ubuntu1~esm3 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream snapd package and not the snapd package as distributed by Ubuntu. See How to fix? for Ubuntu:20.04 relevant fixed versions and status.

An access control bypass and information disclosure vulnerability exists in the base AppArmor security profile configuration of Canonical snapd. The abstraction rules located in /etc/apparmor.d/abstractions/nss-systemd (inherited via ) inadvertently permit strictly confined snap applications, which lack the privileged account-control interface, to interact directly with the io.systemd.Multiplexer and io.systemd.NameServiceSwitch UNIX domain sockets under /run/systemd/userdb/. On systems where the systemd-userdbd service is installed and operational, the service fails to distinguish between an unconfined root user on the host system and a restricted root user running within a snap application's sandbox (such as a daemon or configuration hook). Because systemd-userdbd returns "complete" user records—including sensitive hashed user passwords from /etc/shadow—when queried by a process running as root, a compromised or malicious strictly confined snap executing code as root can successfully query the Varlink interface to retrieve all system password hashes, bypassing intended snap sandbox restrictions. This issue is mitigated by the fact that systemd-userdbd is not installed by default on standard Ubuntu deployments.

CVSS Base Scores

version 3.1