CVE-2021-41091
CVSS V2 Medium 4.6
CVSS V3 Medium 6.3
Description
Moby is an open-source project created by Docker to enable software containerization. A bug was found in Moby (Docker Engine) where the data directory (typically `/var/lib/docker`) contained subdirectories with insufficiently restricted permissions, allowing otherwise unprivileged Linux users to traverse directory contents and execute programs. When containers included executable programs with extended permission bits (such as `setuid`), unprivileged Linux users could discover and execute those programs. When the UID of an unprivileged Linux user on the host collided with the file owner or group inside a container, the unprivileged Linux user on the host could discover, read, and modify those files. This bug has been fixed in Moby (Docker Engine) 20.10.9. Users should update to this version as soon as possible. Running containers should be stopped and restarted for the permissions to be fixed. For users unable to upgrade limit access to the host to trusted users. Limit access to host volumes to trusted containers.
Overview
- CVE ID
- CVE-2021-41091
- Assigner
- security-advisories@github.com
- Vulnerability Status
- Modified
- Published Version
- 2021-10-04T21:15:12
- Last Modified Date
- 2022-06-14T11:15:10
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:mobyproject:moby:*:*:*:*:*:*:*:* | 1 | OR | 20.10.9 | |
| cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:L/AC:L/Au:N/C:P/I:P/A:P
- Access Vector
- LOCAL
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- PARTIAL
- Availability Impact
- PARTIAL
- Base Score
- 4.6
- Severity
- MEDIUM
- Exploitability Score
- 3.9
- Impact Score
- 6.4
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
- Attack Vector
- LOCAL
- Attack Compatibility
- LOW
- Privileges Required
- LOW
- User Interaction
- NONE
- Scope
- CHANGED
- Confidentiality Impact
- LOW
- Availability Impact
- LOW
- Base Score
- 6.3
- Base Severity
- MEDIUM
- Exploitability Score
- 2
- Impact Score
- 3.7
References
| Reference URL | Reference Tags |
|---|---|
| https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf | |
| https://github.com/moby/moby/commit/f0ab919f518c47240ea0e72d0999576bb8008e64 | Patch Third Party Advisory |
| https://github.com/moby/moby/security/advisories/GHSA-3fwx-pjgw-3558 | Third Party Advisory |
| https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/B5Q6G6I4W5COQE25QMC7FJY3I3PAYFBB/ | Mailing List Third Party Advisory |
| https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZNFADTCHHYWVM6W4NJ6CB4FNFM2VMBIB/ | Mailing List Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-41091 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-41091 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 06:44:46 | Added to TrackCVE | |||
| 2022-12-05 11:47:19 | 2021-10-04T21:15Z | 2021-10-04T21:15:12 | CVE Published Date | updated |
| 2022-12-05 11:47:19 | 2022-06-14T11:15:10 | CVE Modified Date | updated | |
| 2022-12-05 11:47:19 | Modified | Vulnerability Status | updated | |
| 2022-12-05 11:47:23 | References | updated | ||
| 2022-12-30 23:12:34 | Modified | Undergoing Analysis | Vulnerability Status | updated |
| 2022-12-30 23:12:34 | Weakness Enumeration | update | ||
| 2022-12-31 00:14:38 | Undergoing Analysis | Modified | Vulnerability Status | updated |