CVE-2024-56433

shadow-utils: Default subordinate ID configuration in /etc/login.defs could lead to compromise

Published Dec 26, 2024 CVSS 3.1 · 3.6 Low EPSS < 1% KEV · Not listed
Description
shadow-utils (aka shadow) 4.4 through 4.17.0 establishes a default /etc/subuid behavior (e.g., uid 100000 through 165535 for the first user account) that can realistically conflict with the uids of users defined on locally administered networks, potentially leading to account takeover, e.g., by leveraging newuidmap for access to an NFS home directory (or same-host resources in the case of remote logins by these local network users). NOTE: it may also be argued that system administrators should not have assigned uids, within local networks, that are within the range that can occur in /etc/subuid.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2024-53142 shadow-utils (aka shadow) 4.4 through 4.17.0 establishes a default /etc/subuid behavior (e.g., uid 100000 through 165535 for the first user account) that can realistically conflict with the uids of users defined on locally administered networks, potentially leading to account takeover, e.g., by leveraging newuidmap for access to an NFS home directory (or same-host resources in the case of remote logins by these local network users). NOTE: it may also be argued that system administrators should not have assigned uids, within local networks, that are within the range that can occur in /etc/subuid.
History
Type Values Removed Values Added
First Time appeared Shadow-maint
Shadow-maint shadow-utils
CPEs cpe:2.3:a:shadow-maint:shadow-utils:*:*:*:*:*:*:*:*
Vendors & Products Shadow-maint
Shadow-maint shadow-utils
Type Values Removed Values Added
Metrics threat_severity

Low

threat_severity

Moderate

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Title shadow-utils: Default subordinate ID configuration in /etc/login.defs could lead to compromise
References
Metrics threat_severity

None

threat_severity

Low

Type Values Removed Values Added
Weaknesses CWE-1188
Metrics cvssV3_1

{'score': 3.6, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N'}

Type Values Removed Values Added
Description shadow-utils (aka shadow) 4.4 through 4.17.0 establishes a default /etc/subuid behavior (e.g., uid 100000 through 165535 for the first user account) that can realistically conflict with the uids of users defined on locally administered networks, potentially leading to account takeover, e.g., by leveraging newuidmap for access to an NFS home directory (or same-host resources in the case of remote logins by these local network users). NOTE: it may also be argued that system administrators should not have assigned uids, within local networks, that are within the range that can occur in /etc/subuid.
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Oct 15, 2026, 12:59 AM
Reserved
Dec 26, 2024, 12:00 AM
Status
Deferred
Published
Dec 26, 2024, 9:15 AM
Modified
Oct 15, 2026, 1:19 AM
Severity
Moderate
Public date
Dec 26, 2024, 12:00 AM