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TI-2018-12048 Aliases CVE-2018-16838GHSA-h2vj-4wwx-54q4

Improper access control in [UNKNOWN] sssd

Priority LOW 27CWE-284Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass, Privilege escalation
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-284 and CWE-269.

Summary

A flaw was found in sssd Group Policy Objects implementation. When the GPO is not readable by SSSD due to a too strict permission settings on the server side, SSSD will allow all authenticated users to login instead of denying access.

Why it matters now

EPSS 0.01157 67th percentileScored 2026-11-07
Fix Fixed Red Hat: 3 advisories

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
[UNKNOWN]sssdall versions—No fix listedCNA
  • sssd Vendor[UNKNOWN] Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:fedoraproject:sssd:-:*:*:*:*:*:*:*not specified by NVDVulnerableFedoraproject
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
  • cpe:2.3:a:fedoraproject:sssd:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Fedoraproject
  • cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat

Remediation

Red Hat 3 advisories

  • RHSA-2019:3651 Released 2019-11-05 · Red Hat rating Low
    sssd security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder (v. 8) libsss_nss_idmap-devel-2.2.0-19.el8
    • Red Hat Enterprise Linux BaseOS (v. 8) libipa_hbac-2.2.0-19.el8, libsss_autofs-2.2.0-19.el8, libsss_certmap-2.2.0-19.el8 +26
  • RHSA-2019:2437 Released 2019-08-12 · Red Hat rating Important
    Red Hat Virtualization security update
    • RHEL 7-based RHEV-H for RHEV 4 (build requirements) imgbased-1.1.9-0.1.el7ev, ovirt-node-ng-4.3.5-0.20190717.0.el7ev, ovirt-node-ng-nodectl-4.3.5-0.20190717.0.el7ev +4
    • Red Hat Virtualization 4 Hypervisor for RHEL 7 redhat-virtualization-host-4.3.5-20190722.0.el7_7, redhat-virtualization-host-image-update-4.3.5-20190722.0.el7_7
  • RHSA-2019:2177 Released 2019-08-06 · Red Hat rating Moderate
    sssd security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Client (v. 7) libipa_hbac-1.16.4-21.el7, libsss_autofs-1.16.4-21.el7, libsss_certmap-1.16.4-21.el7 +24
    • Red Hat Enterprise Linux Client Optional (v. 7) libipa_hbac-devel-1.16.4-21.el7, libsss_certmap-devel-1.16.4-21.el7, libsss_idmap-devel-1.16.4-21.el7 +4
    • Red Hat Enterprise Linux ComputeNode (v. 7) libipa_hbac-1.16.4-21.el7, libsss_autofs-1.16.4-21.el7, libsss_certmap-1.16.4-21.el7 +24
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) libipa_hbac-devel-1.16.4-21.el7, libsss_certmap-devel-1.16.4-21.el7, libsss_idmap-devel-1.16.4-21.el7 +4
    • Red Hat Enterprise Linux Server (v. 7) libipa_hbac-1.16.4-21.el7, libipa_hbac-1.16.4-21.el7.ppc, libsss_autofs-1.16.4-21.el7 +31
    • Red Hat Enterprise Linux Server Optional (v. 7) libipa_hbac-devel-1.16.4-21.el7, libipa_hbac-devel-1.16.4-21.el7.ppc, libsss_certmap-devel-1.16.4-21.el7 +10
    • Red Hat Enterprise Linux Workstation (v. 7) libipa_hbac-1.16.4-21.el7, libsss_autofs-1.16.4-21.el7, libsss_certmap-1.16.4-21.el7 +25
    • Red Hat Enterprise Linux Workstation Optional (v. 7) libipa_hbac-devel-1.16.4-21.el7, libsss_certmap-devel-1.16.4-21.el7, libsss_idmap-devel-1.16.4-21.el7 +3

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

ProductStatusPlan or fix
RHEL 7-based RHEV-H for RHEV 4 (build requirements)Fixed RHSA-2019:2437
Red Hat CodeReady Linux Builder (v. 8)Fixed RHSA-2019:3651
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2019:3651
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2019:2177
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2019:2177
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2019:2177
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2019:2177
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2019:2177
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2019:2177
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2019:2177
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2019:2177
Red Hat Virtualization 4 Hypervisor for RHEL 7Fixed RHSA-2019:2437
Not affected: 2 products
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-16838
  2. 2026-10-03 Alias added: GHSA-h2vj-4wwx-54q4

References

Advisory 6

Other 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences