CVE-2021-43816

Katalog CVE

CVSS 9.1 · Critical EPSS 1,7%

Kerentanan Improper Preservation of Permissions pada linuxfoundation containerd, fedoraproject fedora. Skor CVSS 3.1 9.1 (Critical) menurut NVD.

Deskripsi (NVD)

containerd is an open source container runtime. On installations using SELinux, such as EL8 (CentOS, RHEL), Fedora, or SUSE MicroOS, with containerd since v1.5.0-beta.0 as the backing container runtime interface (CRI), an unprivileged pod scheduled to the node may bind mount, via hostPath volume, any privileged, regular file on disk for complete read/write access (sans delete). Such is achieved by placing the in-container location of the hostPath volume mount at either `/etc/hosts`, `/etc/hostname`, or `/etc/resolv.conf`. These locations are being relabeled indiscriminately to match the container process-label which effectively elevates permissions for savvy containers that would not normally be able to access privileged host files. This issue has been resolved in version 1.5.9. Users are advised to upgrade as soon as possible.

Rincian

Terbit di NVD

5 Januari 2022

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

9.1 (Critical), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-281: Improper Preservation of Permissions

EPSS (30 hari)

1,7% peluang dieksploitasi; lebih tinggi dari 76,3% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/containerd/containerd/commit/a731039238c62be081eb8c31525b988415745eea patch · advisory pihak ketiga
• https://github.com/dweomer/containerd/commit/f7f08f0e34fb97392b0d382e58916d6865100299 patch · advisory pihak ketiga
• https://github.com/containerd/containerd/issues/6194 exploit · issue tracking · advisory pihak ketiga
• https://github.com/containerd/containerd/security/advisories/GHSA-mvff-h3cj-wj9c advisory pihak ketiga
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GD5GH7NMK5VJM...
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MPDIZMI7ZPERS...