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CVE-2023-4154

Status Candidate

Overview

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.

Related Files

Gentoo Linux Security Advisory 202402-28
Posted Feb 19, 2024
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202402-28 - Multiple vulnerabilities have been discovered in Samba, the worst of which can lead to remote code execution. Versions greater than or equal to 4.18.9 are affected.

tags | advisory, remote, vulnerability, code execution
systems | linux, gentoo
advisories | CVE-2018-14628, CVE-2022-2127, CVE-2023-3347, CVE-2023-34966, CVE-2023-34967, CVE-2023-34968, CVE-2023-3961, CVE-2023-4091, CVE-2023-4154, CVE-2023-42669, CVE-2023-42670
SHA-256 | c1b77ea663583d7b2f9d45426761c56ddbb0b4ac671059fc79dbe605a5da5b12
Ubuntu Security Notice USN-6425-3
Posted Oct 17, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6425-3 - USN-6425-1 fixed vulnerabilities in Samba. This update provides the corresponding updates for Ubuntu 23.10. Sri Nagasubramanian discovered that the Samba acl_xattr VFS module incorrectly handled read-only files. When Samba is configured to ignore system ACLs, a remote attacker could possibly use this issue to truncate read-only files. Andrew Bartlett discovered that Samba incorrectly handled the DirSync control. A remote attacker with an RODC DC account could possibly use this issue to obtain all domain secrets. Andrew Bartlett discovered that Samba incorrectly handled the rpcecho development server. A remote attacker could possibly use this issue to cause Samba to stop responding, resulting in a denial of service. Kirin van der Veer discovered that Samba incorrectly handled certain RPC service listeners. A remote attacker could possibly use this issue to cause Samba to start multiple incompatible RPC listeners, resulting in a denial of service. This issue only affected Ubuntu 22.04 LTS, and Ubuntu 23.04.

tags | advisory, remote, denial of service, vulnerability
systems | linux, ubuntu
advisories | CVE-2023-4091, CVE-2023-4154, CVE-2023-42669, CVE-2023-42670
SHA-256 | d00ddbbac04e9ca28e5197158c09754621e8065ad1f124d00bbd8edabbef4103
Debian Security Advisory 5525-1
Posted Oct 12, 2023
Authored by Debian | Site debian.org

Debian Linux Security Advisory 5525-1 - 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.

tags | advisory, denial of service, vulnerability, info disclosure
systems | linux, unix, debian
advisories | CVE-2023-3961, CVE-2023-4091, CVE-2023-4154, CVE-2023-42669, CVE-2023-42670
SHA-256 | 796922c8109c26f29b46a6c85521b96598f1e79e22b650b1166a48c9207bd4e0
Ubuntu Security Notice USN-6425-2
Posted Oct 12, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6425-2 - USN-6425-1 fixed vulnerabilities in Samba. Due to a build issue on Ubuntu 20.04 LTS, the update introduced regressions in macro handling and possibly other functionality. This update fixes the problem. Sri Nagasubramanian discovered that the Samba acl_xattr VFS module incorrectly handled read-only files. When Samba is configured to ignore system ACLs, a remote attacker could possibly use this issue to truncate read-only files. Andrew Bartlett discovered that Samba incorrectly handled the DirSync control. A remote attacker with an RODC DC account could possibly use this issue to obtain all domain secrets. Andrew Bartlett discovered that Samba incorrectly handled the rpcecho development server. A remote attacker could possibly use this issue to cause Samba to stop responding, resulting in a denial of service. Kirin van der Veer discovered that Samba incorrectly handled certain RPC service listeners. A remote attacker could possibly use this issue to cause Samba to start multiple incompatible RPC listeners, resulting in a denial of service. This issue only affected Ubuntu 22.04 LTS, and Ubuntu 23.04.

tags | advisory, remote, denial of service, vulnerability
systems | linux, ubuntu
advisories | CVE-2023-4091, CVE-2023-4154, CVE-2023-42669, CVE-2023-42670
SHA-256 | 0fa2c81e3cb8d54ab0638f2dd3d416aafde2a3eadc511814ef0fb1bbf0af7ed0
Ubuntu Security Notice USN-6425-1
Posted Oct 11, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6425-1 - Sri Nagasubramanian discovered that the Samba acl_xattr VFS module incorrectly handled read-only files. When Samba is configured to ignore system ACLs, a remote attacker could possibly use this issue to truncate read-only files. Andrew Bartlett discovered that Samba incorrectly handled the DirSync control. A remote attacker with an RODC DC account could possibly use this issue to obtain all domain secrets.

tags | advisory, remote
systems | linux, ubuntu
advisories | CVE-2023-4091, CVE-2023-4154, CVE-2023-42669, CVE-2023-42670
SHA-256 | f397259561acfee51e63bb0dfdc0aef2cf6928b2353b00aa36765953ff3a4818
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