CVE-2023-25809

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 v3 5.0 MEDIUM

5.0^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 0.8 / Impact : 3.7

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact LOW

Scope CHANGED

References

Link	Resource
https://github.com/opencontainers/runc/commit/0d62b950e60f6980b54fe3bafd9a9c608dc1df17	Patch
https://github.com/opencontainers/runc/security/advisories/GHSA-m8cg-xc2p-r3fc	Exploit Vendor Advisory
https://github.com/opencontainers/runc/commit/0d62b950e60f6980b54fe3bafd9a9c608dc1df17	Patch
https://github.com/opencontainers/runc/security/advisories/GHSA-m8cg-xc2p-r3fc	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:linuxfoundation:runc:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2023-03-29 19:15

Updated : 2024-11-21 07:50

NVD link : CVE-2023-25809

Mitre link : CVE-2023-25809

CVE.ORG link : CVE-2023-25809

JSON object : View

Products Affected

linuxfoundation

runc

CWE

CWE-281

Improper Preservation of Permissions

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