CVE-2023-4154

Summary

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.

Affected Software

Weaknesses

• CWE-787: Out-of-bounds Write

ADP Enrichment

CVE Program Container

Additional References

• https://access.redhat.com/security/cve/CVE-2023-4154
• https://bugzilla.redhat.com/show_bug.cgi?id=2241883
• https://bugzilla.samba.org/show_bug.cgi?id=15424
• https://security.netapp.com/advisory/ntap-20231124-0002/
• https://www.samba.org/samba/security/CVE-2023-4154.html

References

• https://access.redhat.com/security/cve/CVE-2023-4154
• https://bugzilla.redhat.com/show_bug.cgi?id=2241883
• https://bugzilla.samba.org/show_bug.cgi?id=15424
• https://security.netapp.com/advisory/ntap-20231124-0002/
• https://www.samba.org/samba/security/CVE-2023-4154.html

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