CVE-2021-41091

mediumpriority · track · 36EPSS 0.028 · 87 %ileexploit · PoCDEEURUUS
grimoire priorityP1 · Urgent
Exploitable?
Public exploit
3 exploits · PoC
Likely / severe?
2.85% (87th) EPSS
CVSS 4.6 · medium
Is it mine?
21 products
Check your exposure
Who says so?
8 sources
cnnvd · enisa_euvd · fstec_bdu · osv

EPSS · scored 2026-10-26

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.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

02

cvss

Technical severity, 0–10. One row per scoring source.

6.3
010

base score 0–10 · higher = more severe · hover a vector to decode

v2.04.6mediumAV:L/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 3.9 · impact 6.4
v3.16.3mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:Lprimary · NVD / NIST USexploitability 2 · impact 3.7
v3.16.3mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L/E:P/RL:O/RC:Csecondary · CISA US
v3.16.3mediumAV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:Lsecondary · FSTEC (BDU) RU
v3.16.3mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:Lsecondary · ENISA EU
v3.16.3mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:Lsecondary · security-advisories@github.comexploitability 2 · impact 3.7
v3.15.9mediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:Lsecondary · OSV
v3.16.3mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L/E:P/RL:O/RC:Csecondary · Siemens ProductCERT DE
v3.16mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L/E:Psecondary · CVSS-BT (t0sche)
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-732USprimaryCWE-281USCWE-281USCWE-281USCWE-732USCWE-732USCWE-732US
04

exploits (3)

Public proof-of-concept and weaponised exploit code.

05

affected products (21)

Products and version ranges known to be affected.

showing 20 of 21
06

advisories (7)

Vendor and ecosystem advisories describing this.

  • SSA-222547SSA-222547: Third-Party Component Vulnerabilities in SCALANCE LPE9403 before V2.02022-06-14csaf · siemens_psirtDE

    Multiple vulnerabilities in the third-party components CivetWeb, Docker, Linux Kernel and systemd could allow an attacker to impact SCALANCE LPE9403 confidentiality, integrity and availability. Siemens has released an update for the SCALANCE LPE9403 and recommends to update to the latest version.

  • WID-SEC-W-2022-1375JFrog Artifactory: Mehrere SchwachstellenDeutsch2022-09-11csaf · cert_bundDE

    Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in JFrog Artifactory ausnutzen, um seine Privilegien zu erweitern, beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen und einen Denial-of-Service-Zustand auszulösen.

  • WID-SEC-W-2022-1738IBM InfoSphere Information Server: Mehrere SchwachstellenDeutsch2022-10-16csaf · cert_bundDE

    Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in IBM InfoSphere Information Server ausnutzen, um seine Privilegien zu erweitern, beliebigen Programmcode auszuführen, einen Cross-Site-Scripting-Angriff durchzuführen, Informationen offenzulegen, einen Denial of Service Zustand herbeizuführen, Dateien zu manipulieren oder Sicherheitsvorkehrungen zu umgehen.

  • WID-SEC-W-2023-1124docker: Mehrere SchwachstellenDeutsch2021-10-04csaf · cert_bundDE

    Ein lokaler Angreifer kann mehrere Schwachstellen in docker ausnutzen, um seine Privilegien zu erhöhen oder Informationen offenzulegen.

  • GHSA-3fwx-pjgw-3558Moby (Docker Engine) Insufficiently restricted permissions on data directory2024-01-31ghsa · osvUS

    ## Impact 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. ## Patches 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. ## Workarounds Limit access to the host to trusted users. Limit access to host volumes to trusted containers. ## Credits The Moby project would like to thank Joan Bruguera for responsibly disclosing this issue in accordance with the [Moby security policy](https://github.com/moby/moby/blob/master/SECURITY.md). ## For more information If you have any questions or comments about this advisory: * [Open an issue](https://github.com/moby/moby/issues/new) * Email us at security@docker.com if you think you’ve found a security bug

  • ICSA-22-167-09Siemens SCALANCE LPE9403 Third-Party Vulnerabilities2022-06-14icsa · cisa_csaf_otUS

    Multiple vulnerabilities in the third-party components CivetWeb, Docker, Linux Kernel and systemd could allow an attacker to impact SCALANCE LPE9403 confidentiality, integrity and availability. Siemens has released an update for the SCALANCE LPE9403 and recommends to update to the latest version.

  • GO-2024-2500Moby (Docker Engine) Insufficiently restricted permissions on data directory in github.com/docker/docker2024-06-28vendor · osvUS

    Moby (Docker Engine) Insufficiently restricted permissions on data directory in github.com/docker/docker

07

also known as (6)

Other names and identifiers for this entity.

08

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bduosvcert_bundcisa_csaf_otnvdsiemens_psirtNVDCVE.orgMITRE
published 2021-10-04modified 2026-06-17
10

references (24)

External citations — patches, advisories, analysis.

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