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No exploitation reportedFix available

CVE-2018-16838

No exploitation reported by the sources we read.

  • Published2019-03-25
  • WeaknessCWE-269 · CWE-284

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2019-03-2518:29CVE publishedNVD

Versions per branch

NVD
Fedoraproject sssd
BranchAffectedFixed in
—all versionsno fix published
Redhat enterprise linux
BranchAffectedFixed in
7.0= 7.0no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • imgbasedRed Hat:enterprise_linux:7::hypervisorall versions · fixed in 0:1.1.9-0.1.el7evand 1 other package
  • ovirt-node-ngRed Hat:enterprise_linux:7::hypervisorall versions · fixed in 0:4.3.5-0.20190717.0.el7evand 2 other packages
  • redhat-release-virtualization-hostRed Hat:enterprise_linux:7::hypervisorall versions · fixed in 0:4.3.5-2.el7evand 1 other package
  • redhat-virtualization-hostRed Hat:enterprise_linux:7::hypervisorall versions · fixed in 0:4.3.5-20190722.0.el7_7and 1 other package
  • sssdUbuntu:Pro:16.04:LTSall versions · no fixed version listed
  • sssdUbuntu:20.04:LTSall versions · fixed in 2.2.3-3ubuntu0.7
  • sssdUbuntu:18.04:LTSall versions · fixed in 1.16.1-1ubuntu1.8
  • sssdSUSE:Linux Enterprise Software Development Kit 12 SP4all versions · fixed in 1.16.1-4.12.2

23 more package ranges on OSV.dev

Vendor advisories

  • RHSA-2019:3651 Red Hat Product Security404 products fixed

    Red Hat Security Advisory: sssd security, bug fix, and enhancement update

  • RHSA-2019:2437 Red Hat Product Security11 products fixed

    Red Hat Security Advisory: Red Hat Virtualization security update

  • RHSA-2019:2177 Red Hat Product Security337 products fixed

    Red Hat Security Advisory: sssd security, bug fix, and enhancement update

Full record on NVD

Fix

  1. Vendor fix Red Hat Product Security RHSA-2019:3651 · 404 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
  2. Vendor fix Red Hat Product Security RHSA-2019:2437 · 11 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/2974891

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CNACVSS 3.05.4known since 2026-10-23
  • NVDCVSS 3.05.4read 2026-10-23
  • NVDCVSS 2.05.5read 2026-10-23
  • CNAweakness (CWE)CWE-284known since 2026-10-23
  • NVDweakness (CWE)CWE-269read 2026-10-23
  • FIRST EPSSEPSS score1.2 %2026-11-09
  • OSVaffected packages—
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Published
2019-03-25
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-h2vj-4wwx-54q4

Frequently asked questions

What is CVE-2018-16838?

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.

Is CVE-2018-16838 actively exploited?

Active exploitation of CVE-2018-16838 has not been confirmed. Its EPSS score was 1.2% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

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

CVE-2018-16838 has a CVSS v3 base score of 5.4 (MEDIUM severity), with vector string CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.

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