CVE-2024-5300AppArmor Base Profile Misconfiguration in snapd Permits Confined Snaps Unauthorized Access to Hashed Passwords via systemd-userdbd
Updated under an hour ago ()
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It affects Canonical Ubuntu 26.04 LTS and 5 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 5.6 MEDIUM (v3.1, CNA)CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
- Weakness (CWE)
- CWE-212
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- canonical
- NVD analysis
- Awaiting Analysis
- Record last updated
- Jul 22, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Canonical Ubuntu 26.04 LTS canonical:ubuntu_26.04_lts (from the name) | 2.76+ubuntu26.04.3 not affected | CNA record |
Canonical Ubuntu 24.04 LTS canonical:ubuntu_24.04_lts (from the name) | 2.76+ubuntu24.04.1 not affected | CNA record |
Canonical Ubuntu 22.04 LTS canonical:ubuntu_22.04_lts (from the name) | 2.76+ubuntu22.04.1 not affected | CNA record |
Canonical Ubuntu 20.04 LTS canonical:ubuntu_20.04_lts (from the name) | 2.67.1+20.04ubuntu1~esm2 not affected | CNA record |
Canonical Ubuntu 18.04 LTS canonical:ubuntu_18.04_lts (from the name) | 2.61.4ubuntu0.18.04.1+esm3 not affected | CNA record |
Canonical Ubuntu 16.04 LTS canonical:ubuntu_16.04_lts (from the name) | 2.61.4ubuntu0.16.04.1+esm3 not affected | CNA record |
References
- https://ubuntu.com/security/CVE-2024-5300vdb-entry, issue-tracking
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.