sssd Group Policy Objects access control

CVSS Meta Temp Score
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CTI Interest Score
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5.7$0-$5k0.00

Summaryinfo

A vulnerability was found in sssd. It has been rated as critical. Impacted is an unknown function of the component Group Policy Objects Handler. This manipulation causes access control. This vulnerability is handled as CVE-2018-16838. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in sssd (version unknown). It has been declared as critical. Affected by this vulnerability is an unknown function of the component Group Policy Objects Handler. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was released 03/25/2019 as not defined bug report (Bugzilla). The advisory is shared at bugzilla.redhat.com. This vulnerability is known as CVE-2018-16838 since 09/11/2018. The attack can be launched remotely. The successful exploitation requires a single authentication. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 253355 (Linux Distros Unpatched Vulnerability : CVE-2018-16838), which helps to determine the existence of the flaw in a target environment. The commercial vulnerability scanner Qualys is able to test this issue with plugin 172447 (SUSE Enterprise Linux Security Update for sssd (SUSE-SU-2019:1480-1)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (253355). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.7

VulDB Base Score: 6.3
VulDB Temp Score: 6.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.4
NVD Vector: 🔍

CNA Base Score: 5.4
CNA Vector (Red Hat, Inc.): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 253355
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2018-16838

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

09/11/2018 🔍
03/25/2019 +195 days 🔍
03/26/2019 +1 days 🔍
08/21/2025 +2340 days 🔍

Sourcesinfo

Advisory: RHSA-2019:2177
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-16838 (🔍)
GCVE (CVE): GCVE-0-2018-16838
GCVE (VulDB): GCVE-100-132181

Entryinfo

Created: 03/26/2019 10:11
Updated: 08/21/2025 16:58
Changes: 03/26/2019 10:11 (55), 05/19/2020 17:42 (1), 08/07/2023 08:09 (3), 08/07/2023 08:12 (12), 08/21/2025 16:58 (16)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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