📖 ~4 min read • Source: SUSE advisory SUSE-RU-2024:4391-1 (see also SUSE bugzilla)
Related CVEs: CVE-2024-41110 CVE-2025-22869 CVE-2025-22868 CVE-2023-47108 CVE-2023-45142 CVE-2018-16873 CVE-2019-14271 CVE-2019-19921 +12 more
Upstream summary: Moby is an open-source project created by Docker for software containerization. A security vulnerability has been detected in certain versions of Docker Engine, which could allow an attacker to bypass authorization plugins (AuthZ) under specific circumstances. The base likelihood of this being exploited is low. Using a specially-crafted API request, an Engine API client could make the daemon forward the request or response to an authorization plugin without the body. In certa
Table of contents
Symptom & Impact
On SLES 12 hosts running docker, administrators report behaviour consistent with SUSE advisory SUSE-RU-2024:4391-1: zypper refusing to install or restart affected services, AppArmor profile warnings in journalctl, and — for security-rated advisories — exposure to the vulnerability set above. In production estates the visible impact ranges from a single service restart to wider availability incidents whenever docker sits on the serving path.
Environment & Reproduction
Reproduction targets SLES 12. Confirm release with cat /etc/os-release and SUSEConnect --status-text, and the currently installed package with rpm -q docker. Capture system state with supportconfig -R /var/tmp -B docker if you need to attach evidence to a SUSE support case. Trigger the workflow that exposes docker — multiple vulnerabilities (20 CVEs) — patch and remediation guide while collecting journalctl -b, zypper history, and rpm -qa output.
Root Cause Analysis
Root cause is documented in SUSE advisory SUSE-RU-2024:4391-1. Upstream maintainers shipped fixes in the corresponding docker update for SLES 12; running an outdated build leaves the host exposed to the failure modes described in the advisory. Correlate journalctl --since timestamps with zypper history entries and any AppArmor denials in /var/log/audit/audit.log to isolate the originating change.
Quick Triage
Quick triage: run systemctl status docker, journalctl -u docker -n 200, zypper patch-check, zypper lp, firewall-cmd --list-all, and aa-status. If AppArmor is in enforce mode, capture journalctl -k | grep apparmor to surface denials linked to docker — multiple vulnerabilities (20 CVEs) — patch and remediation guide.
Step-by-Step Diagnosis
1) Confirm symptom with systemctl --failed. 2) Inspect logs: journalctl -xe and journalctl -u docker. 3) Validate firewall: firewall-cmd --list-all-zones. 4) Check AppArmor: aa-status and journalctl -k | grep apparmor. 5) Verify package integrity: rpm -V docker and zypper verify. 6) Correlate findings with zypper history, /var/log/zypp/history, and SUSE advisory SUSE-RU-2024:4391-1 to pin the change that introduced docker — multiple vulnerabilities (20 CVEs) — patch and remediation guide.
Solution – Primary Fix
Primary fix for docker — multiple vulnerabilities (20 CVEs) — patch and remediation guide: apply the corrective zypper transaction described in SUSE advisory SUSE-RU-2024:4391-1, reload the affected systemd unit, and reconcile firewalld and AppArmor state. Typical commands: sudo zypper ref, sudo zypper -n patch or sudo zypper -n update docker, sudo systemctl daemon-reload, sudo systemctl restart docker, then rpm -q docker to validate the new build is installed. For kernel advisories add sudo systemctl reboot or schedule a Live Patch (kgraft/klp) where covered by your SUSE subscription.
Need help rolling this patch across a SUSE fleet? Our IT Solutions & Services team manages SUSE patch windows with zero-downtime change controls. Get in touch for a free consultation.
Solution – Alternative Approaches
Alternatives include rolling back the offending transaction with sudo zypper history --rollback <id> (Btrfs Snapper snapshots make this safe on SLES 12), locking the package via sudo zypper al docker, switching firewalld backends between nftables and iptables in /etc/firewalld/firewalld.conf, or temporarily disabling the AppArmor profile with sudo aa-disable /etc/apparmor.d/usr.sbin.docker to confirm policy is the cause before authoring a custom profile. Where Live Patching is licensed, klp patches applies kernel fixes without reboot.
Verification & Acceptance Criteria
Acceptance: rpm -q docker shows the expected fixed version, systemctl is-active docker returns active, journalctl -u docker --since "5 minutes ago" shows no errors, zypper patch-check reports zero open patches for this advisory, firewall-cmd --list-services includes the required services, aa-status reports the intended profile mode, and the original reproduction steps for docker — multiple vulnerabilities (20 CVEs) — patch and remediation guide no longer trigger the failure across two consecutive runs.
Rollback Plan
Capture state with zypper history list, snapper list, and rpm -qa > /root/rpm-pre.txt before any change. To revert, run sudo snapper undochange <pre>..<post> on Btrfs deployments or sudo zypper install --oldpackage docker-<old-version> and reload systemctl daemon-reload. Remove custom AppArmor profiles with sudo apparmor_parser -R. Reboot if the kernel or initramfs was changed and re-verify symptoms.
Prevention & Hardening
Prevent recurrence by enabling automatic security patches with zypper-automatic or YaST > Online Update Configuration, subscribing to the SUSE-SU mailing list, mirroring through SUSE Manager / RMT for controlled rollouts, version-locking sensitive packages with zypper al, and monitoring file integrity with aide --check. Apply CIS SLES 12 hardening, enable Snapper rollbacks on Btrfs root, and where supported enable SUSE Live Patching so future advisories like this can be remediated without reboot.
Related Errors & Cross-Refs
Related issues that commonly surface alongside docker — multiple vulnerabilities (20 CVEs) — patch and remediation guide: zypper transaction lock contention, systemd unit ordering cycles, AppArmor denials in journalctl -k, firewalld zone drift, and kernel taint flags shown by cat /proc/sys/kernel/tainted. See sibling common-problem articles in this SLES 12 series for adjacent failure modes.
View all sles-12 tutorials on the Tutorials Hub →
Browse all common problems & solutions on the Tutorials Hub.
References & Further Reading
Primary reference: SUSE advisory SUSE-RU-2024:4391-1 (see also SUSE bugzilla). Supporting docs: SUSE Linux Enterprise Server Administration Guide, man zypper, man systemctl, man firewall-cmd, man aa-status, man snapper, man journalctl, the SUSE patch finder at suse.com/patches/, and the SUSE Live Patching documentation. Review /usr/share/doc/packages/docker/ for component-level notes implicated in docker — multiple vulnerabilities (20 CVEs) — patch and remediation guide.
