Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
None
Privileges Required
Low
Attack Vector
Adjacent_network
0

CVE-2021-21284

Disclosure Date: February 02, 2021
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

Description

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.

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CVSS V3 Severity and Metrics
Base Score:
6.8 Medium
Impact Score:
4
Exploitability Score:
2.3
Vector:
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N
Attack Vector (AV):
Adjacent_network
Attack Complexity (AC):
Low
Privileges Required (PR):
Low
User Interaction (UI):
None
Scope (S):
Changed
Confidentiality (C):
None
Integrity (I):
High
Availability (A):
None

General Information

Vendors

  • moby

Products

  • moby
Technical Analysis