Vulnerability · Published Dec 26, 2024 · Assigned by mitre
CVE-2024-56433
Low 3.6
In plain English
A low-severity security flaw in shadow-utils from shadow-maint. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | shadow-utils | 2:4.15.0-8.el10 | ALSA-2025:20145 |
| AlmaLinux:9 | shadow-utils | 2:4.9-15.el9 | ALSA-2025:20559 |
| AlmaLinux:10 | shadow-utils-subid | 2:4.15.0-8.el10 | ALSA-2025:20145 |
| AlmaLinux:9 | shadow-utils-subid | 2:4.9-15.el9 | ALSA-2025:20559 |
| AlmaLinux:10 | shadow-utils-subid-devel | 2:4.15.0-8.el10 | ALSA-2025:20145 |
| AlmaLinux:9 | shadow-utils-subid-devel | 2:4.9-15.el9 | ALSA-2025:20559 |
| Debian:12 | shadow | no fix listed | DEBIAN-CVE-2024-56433 |
| Debian:13 | shadow | no fix listed | DEBIAN-CVE-2024-56433 |
| Debian:14 | shadow | no fix listed | DEBIAN-CVE-2024-56433 |
| Rocky Linux:10 | shadow-utils | 2:4.15.0-8.el10 | RLSA-2025:20145 |
| Rocky Linux:9 | shadow-utils | 2:4.9-15.el9 | RLSA-2025:20559 |
| Ubuntu:22.04:LTS | shadow | no fix listed | UBUNTU-CVE-2024-56433 |
| Ubuntu:24.04:LTS | shadow | no fix listed | UBUNTU-CVE-2024-56433 |
| Ubuntu:25.10 | shadow | no fix listed | UBUNTU-CVE-2024-56433 |
| Ubuntu:26.04:LTS | shadow | no fix listed | UBUNTU-CVE-2024-56433 |
| Ubuntu:26.10 | shadow | no fix listed | UBUNTU-CVE-2024-56433 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| shadow-maint | shadow-utils | 4.4 – through 4.17.0 |
Weakness: CWE-1188 · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N