CVE-2024-56433

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.

Published: 2024-12-26 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Deferred，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-56433 is rated Low Risk (20.5/100): CVSS Low severity, with low exploitation likelihood (EPSS 0.40%). 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-2024-56433

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 2026-06-15 6.00% 0.40% -5.60%
2 2026-05-17 4.51% 6.00% +1.49%
3 2026-02-03 — 4.51% —

Full EPSS history (26 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-56433

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
3.6 3.1 LOW
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
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:N)
Service keeps running; no real outage angle.
 1.0 2.5 [email protected]

Weakness enumeration for CVE-2024-56433

OS Trackers for CVE-2024-56433

vendor priority summary link
debian not yet assigned CVE-2024-56433 not yet assigned priority: Debian including 1 source packages (shadow), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 5. https://security-tracker.debian.org/tracker/CVE-2024-56433
redhat low — https://access.redhat.com/security/cve/CVE-2024-56433
ubuntu low CVE-2024-56433 low priority: Ubuntu including 1 source packages (shadow), 10 status rows across 10 suites (bionic, focal, jammy, noble, oracular, plucky, questing, trusty, upstream, xenial): deferred 7, ignored 2, needs-triage 1. https://ubuntu.com/security/CVE-2024-56433

Affected software / configurations for CVE-2024-56433

Vendor Product Version Raw CPE
shadow-maint shadow-utils >= 4.4, <= 4.17.0 cpe:2.3:a:shadow-maint:shadow-utils:*:*:*:*:*:*:*:*

References for CVE-2024-56433

cvelogic Threat Intelligence