Vulnerability in Moby
CVE-2021-41089
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.
EPSS: 0.003 (21.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 2.8 (Low). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N.
Affected products
- Moby — versions < 20.10.9
- Mobyproject Moby
- Fedoraproject Fedora — versions 34, 35
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)
- security-advisories@github.com (Patch, Third Party Advisory, x_refsource_MISC)
- security-advisories@github.com (x_refsource_FEDORA, vendor-advisory)
- security-advisories@github.com (x_refsource_FEDORA, vendor-advisory)
- security-advisories@github.com (x_refsource_CONFIRM)
Frequently asked questions
- What is CVE-2021-41089?
- CVE-2021-41089 is a low-severity vulnerability in Moby, classified under Improper Preservation of Permissions. CVSS score: 2.8/10. Published 2021-10-04.
- How severe is CVE-2021-41089?
- Low severity. CVSS v3 base score is 2.8 out of 10.
- Is CVE-2021-41089 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.