UBUNTU-CVE-2023-4154

Advisory lineage Upstream: 1 Downstream: 1
Upstream
CVE-2023-4154
Downstream
USN-6425-1
Published: 10 Oct 2023, 00:00
Last modified:22 Apr 2026, 14:11

Vulnerability Summary

Overall Risk (default)
medium
26/100
CVSS Score
6.5 MEDIUM
3.1 (osv_ubuntu)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

10 Oct 2023, 00:00
Published
Vulnerability first disclosed
22 Apr 2026, 14:11
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•MEDIUM•Score: 6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected Systems

  • ubuntu•samba

    all | < 2:4.15.13+dfsg-0ubuntu0.20.04.6 | < 2:4.15.13+dfsg-0ubuntu1.5 | < 2:4.18.6+dfsg-1ubuntu2.1

References (5)