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CVE-2018-16838

20
FAUCET Score

CVE-2018-16838 is a flaw in the SSSD Group Policy Objects implementation that affects fedoraproject and redhat enterprise_linux and sssd products. If GPO permissions are too strict, SSSD incorrectly allows all authenticated users to log in instead of denying access. This medium-severity vulnerability (CVSS 5.4) has a low attack complexity and requires low privileges, potentially leading to limited confidentiality and integrity impacts. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:fedoraproject:sssd:-:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.4MEDIUM

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.5
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.10%
Probability of exploitation in next 30 days
EPSS Percentile
62.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0110 is in the 76th percentile among its peer group of 21,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (6)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: sssd-0:1.16.4-21.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: sssd-0:2.2.0-19.el8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Virtualization 4 for Red Hat Enterprise Linux 7Fixed in: imgbased-0:1.1.9-0.1.el7ev
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Virtualization 4 for Red Hat Enterprise Linux 7Fixed in: ovirt-node-ng-0:4.3.5-0.20190717.0.el7ev
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Virtualization 4 for Red Hat Enterprise Linux 7Fixed in: redhat-release-virtualization-host-0:4.3.5-2.el7ev
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Virtualization 4 for Red Hat Enterprise Linux 7Fixed in: redhat-virtualization-host-0:4.3.5-20190722.0.el7_7
View patch

Vendor Advisories (1)

redhatCVE-2018-16838Low

sssd: improper implementation of GPOs due to too restrictive permissions

Feb 4, 2019

References

lists.opensuse.org / opensuse-security-announce/2019-06/msg00042.html
lists.opensuse.org / opensuse-security-announce/2019-06/msg00051.html
access.redhat.com / errata/RHSA-2019:2177
access.redhat.com / errata/RHSA-2019:2437
access.redhat.com / errata/RHSA-2019:3651
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory
lists.debian.org / debian-lts-announce/2023/05/msg00028.html