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Alpine Linux: CVE-2023-4154: Out-of-bounds Write

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Alpine Linux: CVE-2023-4154: Out-of-bounds Write

Severity
9
CVSS
(AV:N/AC:M/Au:S/C:C/I:C/A:C)
Published
11/07/2023
Created
03/22/2024
Added
03/26/2024
Modified
10/14/2024

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)

  • alpine-linux-upgrade-samba

References

  • https://attackerkb.com/topics/cve-2023-4154
  • CVE - 2023-4154
  • https://security.alpinelinux.org/vuln/CVE-2023-4154
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