CVE-2018-16838

MEDIUMNVD 5.45.4—

5.4

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.

CVSS v3: 5.4
EG Score: 5.4(medium)
EPSS: 78.2%
KEV: Not listed

Published

March 25, 2019

Last Modified

November 21, 2024

References (14)

secalert@redhathttp://lists.opensuse.org/opensuse-security-announce/2019-06/msg00042.html
secalert@redhathttp://lists.opensuse.org/opensuse-security-announce/2019-06/msg00051.html
secalert@redhathttps://access.redhat.com/errata/RHSA-2019:2177
secalert@redhathttps://access.redhat.com/errata/RHSA-2019:2437
secalert@redhathttps://access.redhat.com/errata/RHSA-2019:3651
secalert@redhathttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16838
secalert@redhathttps://lists.debian.org/debian-lts-announce/2023/05/msg00028.html
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00042.html
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00051.html
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2019:2177
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2019:2437
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2019:3651
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16838
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2023/05/msg00028.html

Patch Availability(4)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	sssd-proxy (2.4.0-1ubuntu6.1) @ hirsute	2026-05-27	ubuntu
redhat	sssd-0:2.2.0-19.el8	2019-11-05	redhat
redhat	redhat-virtualization-host-0:4.3.5-20190722.0.el7_7	2019-08-12	redhat
redhat	sssd-0:1.16.4-21.el7	2019-08-06	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(4)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 10× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:49 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:28 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-29 13:41 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-27 21:28 UTCEG score recompute
2026-05-27 21:28 UTCVendor advisory
2026-05-27 21:28 UTCGHSA enrichment
2026-05-27 13:38 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-27 08:44 UTCOSV refresh
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Frequently asked(5)

What is CVE-2018-16838?

CVE-2018-16838 is a medium vulnerability published on March 25, 2019. 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.

When was CVE-2018-16838 disclosed?

CVE-2018-16838 was first published in the National Vulnerability Database on March 25, 2019, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2018-16838 actively exploited?

CVE-2018-16838 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 78.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2018-16838?

CVE-2018-16838 has a CVSS v3 base score of 5.4 (NVD).

How do I remediate CVE-2018-16838?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-16838, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2018-16838

Explore →

Is Your Infrastructure Affected by CVE-2018-16838?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs

CVE-2018-16838

Published

Last Modified

References (14)

Patch Availability(4)

Weakness Classification(2)

All Vendor Advisories

Data Freshness Timeline

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2018-16838?

Same vendor

Same CWE

CVE-2018-16838

📅 Published

🔄 Last Modified

🔗 References (14)

Patch Availability(4)

Weakness Classification(2)

All Vendor Advisories

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2018-16838?

🔗 Related CVEs(same vendor + same CWE)

Same vendor

Same CWE

Published

Last Modified

References (14)

Frequently asked(5)

Related CVEs(same vendor + same CWE)