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Fencer Vulns
low 3.6

CVE-2024-56433 json

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…

published 2024-12-26 22 mo ago modified 2026-10-15 25 d ago also EUVD-2024-53142

cvss
3.6
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 37%
public exploits
0
none known

Summary

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.

Patch / fix

  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP V3.1.5
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP V3.1.5
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP V3.1.5
  • shadow-utils RHEL 10.1 2:4.15.0-8.el10
  • shadow-utils-subid RHEL 10.1 2:4.15.0-8.el10
  • shadow-utils RHEL 9 2:4.9-15.el9
  • shadow-utils-subid RHEL 9 2:4.9-15.el9

red hat advisories RHSA-2025:20145RHSA-2025:20559

  • shadow-utils AlmaLinux 10 2:4.15.0-8.el10
  • shadow-utils-subid AlmaLinux 10 2:4.15.0-8.el10
  • shadow-utils AlmaLinux 9 2:4.9-15.el9
  • shadow-utils-subid AlmaLinux 9 2:4.9-15.el9

almalinux advisories ALSA-2025:20145ALSA-2025:20559

  • shadow-utils Rocky Linux 10 2:4.15.0-8.el10
  • shadow-utils Rocky Linux 9 2:4.9-15.el9

rocky linux advisories RLSA-2025:20145RLSA-2025:20559

  • shadow-utils Azure Linux 3.0 shadow-utils_4.18.0

azure linux advisories AZL-54674

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-56433 updated cvss 3.6

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

  • Red Hat Enterprise Linux 6 shadow-utils Red Hat Enterprise Linux 7 shadow-utils Red Hat Enterprise Linux 8 shadow-utils, shadow-utils-subid Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9
    affected: no fix available “Fix deferred”
  • Red Hat AI Inference Server 3.2 rhaiis 1772160593, rhaiis 1772160625, rhaiis 3.2.2-1764871796, rhaiis 3.2.2-1765379049, rhaiis 3.2.2-1765379088
    fixed: vendor fix RHSA-2025:23080
  • Red Hat Ceph Storage 7 rhceph
    fixed: vendor fix RHSA-2025:22529
  • Red Hat Ceph Storage 8 rhceph
    fixed: vendor fix RHSA-2025:22548
  • Red Hat Discovery 2 discovery 2.4.0-1763596485, discovery 2.4.0-1763656152
    fixed: vendor fix RHSA-2025:21994
  • Red Hat Enterprise Linux BaseOS (v. 9) shadow-utils 4.9-15.el9, shadow-utils-subid 4.9-15.el9
    fixed: vendor fix RHSA-2025:20559
  • Red Hat Enterprise Linux BaseOS (v. 10) shadow-utils 4.15.0-8.el10, shadow-utils-subid 4.15.0-8.el10
    fixed: vendor fix RHSA-2025:20145
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) shadow-utils-debuginfo 4.9-15.el9, shadow-utils-debugsource 4.9-15.el9, shadow-utils-subid-devel 4.9-15.el9, shadow-utils-subid-debuginfo 4.9-15.el9
    fixed: vendor fix RHSA-2025:20559
show 3 more
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) shadow-utils-debuginfo 4.15.0-8.el10, shadow-utils-debugsource 4.15.0-8.el10, shadow-utils-subid-devel 4.15.0-8.el10, shadow-utils-subid-debuginfo 4.15.0-8.el10
    fixed: vendor fix RHSA-2025:20145
  • Red Hat Insights proxy 1.5 insights-proxy 1.5.9-1765201856
    fixed: vendor fix RHSA-2025:22868
  • Red Hat Ceph Storage 7 rhceph Red Hat Ceph Storage 8 rhceph
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
22 mo ago

Exploit prediction

0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 3.6 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

Affected products

  • shadow-maint shadow-utils
  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP

Classification

Weakness
  • CWE-1188 Initialization of a Resource with an Insecure Default

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.