Improper Preservation of Permissions Affecting runc package, versions <4:1.1.9-1.el9
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Test your applications- Snyk ID SNYK-ALMALINUX9-RUNC-6061374
- published 15 Nov 2023
- disclosed 7 Nov 2023
Introduced: 7 Nov 2023
CVE-2023-25809 Open this link in a new tabHow to fix?
Upgrade AlmaLinux:9 runc to version 4:1.1.9-1.el9 or higher.
This issue was patched in ALSA-2023:6380.
NVD Description
Note: Versions mentioned in the description apply only to the upstream runc package and not the runc package as distributed by AlmaLinux.
See How to fix? for AlmaLinux:9 relevant fixed versions and status.
runc is a CLI tool for spawning and running containers according to the OCI specification. In affected versions it was found that rootless runc makes /sys/fs/cgroup writable in following conditons: 1. when runc is executed inside the user namespace, and the config.json does not specify the cgroup namespace to be unshared (e.g.., (docker|podman|nerdctl) run --cgroupns=host, with Rootless Docker/Podman/nerdctl) or 2. when runc is executed outside the user namespace, and /sys is mounted with rbind, ro (e.g., runc spec --rootless; this condition is very rare). A container may gain the write access to user-owned cgroup hierarchy /sys/fs/cgroup/user.slice/... on the host . Other users's cgroup hierarchies are not affected. Users are advised to upgrade to version 1.1.5. Users unable to upgrade may unshare the cgroup namespace ((docker|podman|nerdctl) run --cgroupns=private). This is the default behavior of Docker/Podman/nerdctl on cgroup v2 hosts. or add /sys/fs/cgroup to maskedPaths.
References
- https://errata.almalinux.org/9/ALSA-2023-6380.html
- https://errata.almalinux.org/8/ALSA-2023-6938.html
- https://errata.almalinux.org/8/ALSA-2023-6939.html
- https://access.redhat.com/security/cve/CVE-2023-25809
- https://access.redhat.com/errata/RHSA-2023:6380
- https://access.redhat.com/errata/RHSA-2023:6938
- https://access.redhat.com/errata/RHSA-2023:6939
- https://github.com/opencontainers/runc/commit/0d62b950e60f6980b54fe3bafd9a9c608dc1df17
- https://github.com/opencontainers/runc/security/advisories/GHSA-m8cg-xc2p-r3fc