CVE-2021-3948

An incorrect default permissions vulnerability was found in the mig-controller. Due to an incorrect cluster namespaces handling an attacker may be able to migrate a malicious workload to the target cluster, impacting confidentiality, integrity, and availability of the services located on that cluster.

Published: 2022-02-18 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-3948 is rated Low Risk (36.4/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.13%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-3948

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-28 0.19% 0.13% -0.06%
2 2025-11-21 0.13% 0.19% +0.06%
3 2025-11-18 — 0.13% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-3948

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 2.8 3.4 [email protected]
6.5 2.0 MEDIUM
AV:N/AC:L/Au:S/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.0 6.4 [email protected]

Weakness enumeration for CVE-2021-3948

OS Trackers for CVE-2021-3948

vendor priority summary link
redhat medium — https://access.redhat.com/security/cve/CVE-2021-3948

Affected software / configurations for CVE-2021-3948

Vendor Product Version Raw CPE
konveyor mig-controller < 1.5.2 cpe:2.3:a:konveyor:mig-controller:*:*:*:*:*:*:*:*
konveyor mig-controller >= 1.6.0, < 1.6.3 cpe:2.3:a:konveyor:mig-controller:*:*:*:*:*:*:*:*
redhat migration_toolkit 1.0 cpe:2.3:a:redhat:migration_toolkit:1.0:*:*:*:*:*:*:*
redhat migration_toolkit 1.5 cpe:2.3:a:redhat:migration_toolkit:1.5:*:*:*:*:containers:*:*
redhat migration_toolkit 1.6 cpe:2.3:a:redhat:migration_toolkit:1.6:*:*:*:*:containers:*:*

References for CVE-2021-3948

URL Tags
https://bugzilla.redhat.com/show_bug.cgi?id=2022017 Issue Tracking Patch Third Party Advisory
cvelogic Threat Intelligence