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Ubuntu: (Multiple Advisories) (CVE-2023-4154): Samba vulnerabilities

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Ubuntu: (Multiple Advisories) (CVE-2023-4154): Samba vulnerabilities

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
10/10/2023
Created
10/11/2023
Added
10/11/2023
Modified
11/17/2023

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.

Solution(s)

  • ubuntu-upgrade-samba

References

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