high
7.5
CWE
787
Advisory Published
CVE Published
CVE Published
Updated

CVE-2023-4154: Samba: ad dc password exposure to privileged users and rodcs

First published: Tue Oct 03 2023(Updated: )

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.

Credit: secalert@redhat.com secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
redhat/samba<4.19.1
4.19.1
redhat/samba<4.18.8
4.18.8
redhat/samba<4.17.12
4.17.12
Samba Samba>=4.0.0<4.17.12
Samba Samba>=4.18.0<4.18.8
Samba Samba>=4.19.0<4.19.1
ubuntu/samba<2:4.15.13+dfsg-0ubuntu0.20.04.6
2:4.15.13+dfsg-0ubuntu0.20.04.6
ubuntu/samba<2:4.15.13+dfsg-0ubuntu1.5
2:4.15.13+dfsg-0ubuntu1.5
ubuntu/samba<2:4.17.7+dfsg-1ubuntu2.3
2:4.17.7+dfsg-1ubuntu2.3
ubuntu/samba<2:4.18.6+dfsg-1ubuntu2.1
2:4.18.6+dfsg-1ubuntu2.1
ubuntu/samba<2:4.18.6+dfsg-1ubuntu2.1
2:4.18.6+dfsg-1ubuntu2.1
debian/samba<=2:4.13.13+dfsg-1~deb11u6
2:4.17.12+dfsg-0+deb12u1
2:4.21.0~rc1+really4.20.3+dfsg-1
2:4.21.0~rc1+really4.20.4+dfsg-1
>=4.0.0<4.17.12
>=4.18.0<4.18.8
>=4.19.0<4.19.1

Remedy

https://bugzilla.samba.org/show_bug.cgi?id=15424

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2023-4154?

    CVE-2023-4154 is a vulnerability that allows privileged users and RODCs to expose the Samba AD DC password.

  • How severe is CVE-2023-4154?

    CVE-2023-4154 is considered a severe vulnerability.

  • Which software versions are affected by CVE-2023-4154?

    Samba versions 2:4.15.13+dfsg-0ubuntu0.20.04.6, 2:4.15.13+dfsg-0ubuntu1.5, and 2:4.17.7+dfsg-1ubuntu2.3 are affected by CVE-2023-4154.

  • How can I fix CVE-2023-4154?

    To fix CVE-2023-4154, update Samba to version 2:4.15.13+dfsg-0ubuntu0.20.04.6, 2:4.15.13+dfsg-0ubuntu1.5, or 2:4.17.7+dfsg-1ubuntu2.3.

  • Where can I find more information about CVE-2023-4154?

    You can find more information about CVE-2023-4154 at the following references: [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-4154), [Samba](https://www.samba.org/samba/security/CVE-2023-4154.html), [Ubuntu Security Notices](https://ubuntu.com/security/notices/USN-6425-1).

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