CVE-2021-21284

Katalog CVE

CVSS 6.8 · Medium EPSS 1,1%

Kerentanan Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') pada docker, debian linux +1 lainnya. Skor CVSS 3.1 6.8 (Medium) menurut NVD.

Deskripsi (NVD)

In Docker before versions 9.03.15, 20.10.3 there is a vulnerability involving the --userns-remap option in which access to remapped root allows privilege escalation to real root. When using "--userns-remap", if the root user in the remapped namespace has access to the host filesystem they can modify files under "/var/lib/docker/<remapping>" that cause writing files with extended privileges. Versions 20.10.3 and 19.03.15 contain patches that prevent privilege escalation from remapped user.

Rincian

Terbit di NVD

2 Februari 2021

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

EPSS (30 hari)

1,1% peluang dieksploitasi; lebih tinggi dari 63,8% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://docs.docker.com/engine/release-notes/#20103 release notes · advisory vendor
• https://github.com/moby/moby/commit/64bd4485b3a66a597c02c95f5776395e540b2c7c patch · advisory pihak ketiga
• https://security.gentoo.org/glsa/202107-23 patch · advisory pihak ketiga
• https://github.com/moby/moby/releases/tag/v19.03.15 release notes · advisory pihak ketiga
• https://github.com/moby/moby/releases/tag/v20.10.3 release notes · advisory pihak ketiga
• https://github.com/moby/moby/security/advisories/GHSA-7452-xqpj-6rpc advisory pihak ketiga
• https://security.netapp.com/advisory/ntap-20210226-0005/ advisory pihak ketiga
• https://www.debian.org/security/2021/dsa-4865 advisory pihak ketiga