6.5
CVSSv3

CVE-2023-4154

Published: 07/11/2023 Updated: 29/12/2023
CVSS v3 Base Score: 6.5 | Impact Score: 3.6 | Exploitability Score: 2.8
VMScore: 0

Vulnerability 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.

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Vendor Advisories

Several vulnerabilities have been discovered in Samba, a SMB/CIFS file, print, and login server for Unix, which might result in denial of service, information disclosure or privilege escalation For the stable distribution (bookworm), these problems have been fixed in version 2:41712+dfsg-0+deb12u1 We recommend that you upgrade your samba packag ...