CVE-2021-41089 LOW

CVE-2021-41089: `docker cp` allows unexpected chmod of host files

Vendor Moby
Product moby
Weakness CWE-281
Published October 4, 2021
Last update August 4, 2024

CVSS base score

2.8/10
Attack vector Local
Attack complexity High
Privileges required Low
User interaction None
Confidentiality Low
Integrity None

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N

What the vulnerability does

01Description

Moby is an open-source project created by Docker to enable software containerization. A bug was found in Moby (Docker Engine) where attempting to copy files using `docker cp` into a specially-crafted container can result in Unix file permission changes for existing files in the host’s filesystem, widening access to others. This bug does not directly allow files to be read, modified, or executed without an additional cooperating process. This bug has been fixed in Moby (Docker Engine) 20.10.9. Users should update to this version as soon as possible. Running containers do not need to be restarted.

Key dates

02Disclosure timeline

October 4, 2021 CVE published
August 4, 2024 Record updated