Incorrect Default Permissions Affecting container-tools:rhel8/fuse-overlayfs package, versions <0:1.12-1.module+el8.9.0+19090+d2921118


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.04% (15th percentile)

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  • Snyk IDSNYK-RHEL8-CONTAINERTOOLS-6058550
  • published15 Nov 2023
  • disclosed29 Mar 2023

Introduced: 29 Mar 2023

CVE-2023-25809  (opens in a new tab)
CWE-276  (opens in a new tab)

How to fix?

Upgrade RHEL:8 container-tools:rhel8/fuse-overlayfs to version 0:1.12-1.module+el8.9.0+19090+d2921118 or higher.
This issue was patched in RHSA-2023:6939.

NVD Description

Note: Versions mentioned in the description apply only to the upstream container-tools:rhel8/fuse-overlayfs package and not the container-tools:rhel8/fuse-overlayfs package as distributed by RHEL. See How to fix? for RHEL:8 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.

CVSS Scores

version 3.1