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CVE-2023-4154

7.5 · HIGH

A design flaw was found in Samba's DirSync control implementation, which exposes passwords and secrets in Active Directory to privileged users and Read-Only Domain Controllers (RODCs).

Published Nov 7, 2023CWE-787EPSS 1.40%

Overview

CVE-2023-4154 is a high-severity vulnerability. It was published on November 7, 2023 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

A design flaw was found in Samba's DirSync control implementation, which exposes passwords and secrets in Active Directory to privileged users and Read-Only Domain Controllers (RODCs). This flaw allows RODCs and users possessing the GET_CHANGES right to access all attributes, including sensitive secrets and passwords. Even in a default setup, RODC DC accounts, which should only replicate some passwords, can gain access to all domain secrets, including the vital krbtgt, effectively eliminating the RODC / DC distinction. Furthermore, the vulnerability fails to account for error conditions (fail open), like out-of-memory situations, potentially granting access to secret attributes, even under low-privileged attacker influence.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refaccess.redhat.com/security/cve/CVE-2023-4154Refbugzilla.redhat.com/show_bug.cgi?id=2241883Refbugzilla.samba.org/show_bug.cgi?id=15424Refsecurity.netapp.com/advisory/ntap-20231124-0002/Refwww.samba.org/samba/security/CVE-2023-4154.htmlRefaccess.redhat.com/security/cve/CVE-2023-4154Refbugzilla.redhat.com/show_bug.cgi?id=2241883Refbugzilla.samba.org/show_bug.cgi?id=15424Refsecurity.netapp.com/advisory/ntap-20231124-0002/Refwww.samba.org/samba/security/CVE-2023-4154.html

How CyberStrike helps

Frequently asked questions

What is CVE-2023-4154?

CVE-2023-4154 is a high-severity vulnerability. It was published on November 7, 2023 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2023-4154?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2023-4154?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2023-4154?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-4154 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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