# CVE-2023-42670: ctdb: A flaw was found in Samba CVE-2023-42670 is fixed in 16 products on 1 platform, first by ctdb 2:4.15.13+dfsg-0ubuntu1.5, released October 9, 2023. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2023-42670 - Priority: Routine - CVSS: 6.5 (Medium) - EPSS: 0.0132 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Oct 9, 2023 ## Description A flaw was found in Samba. It is susceptible to a vulnerability where multiple incompatible RPC listeners can be initiated, causing disruptions in the AD DC service. When Samba's RPC server experiences a high load or unresponsiveness, servers intended for non-AD DC purposes (for example, NT4-emulation "classic DCs") can erroneously start and compete for the same unix domain sockets. This issue leads to partial query responses from the AD DC, causing issues such as "The procedure number is out of range" when using tools like Active Directory Users. This flaw allows an attacker to disrupt AD DC services. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | ctdb Ubuntu 22.04.1 LTS (jammy) | 2:4.15.13+dfsg-0ubuntu1.5 | [ctdb 2:4.15.13+dfsg-0ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-ctdb-2-4.15.13-dfsg-0ubuntu1.5.md) | Oct 9, 2023 | | Linux | libnss-winbind Ubuntu 22.04.1 LTS (jammy) | 2:4.15.13+dfsg-0ubuntu1.5 | [libnss-winbind 2:4.15.13+dfsg-0ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libnss-winbind-2-4.15.13-dfsg-0ubuntu1.5.md) | Oct 9, 2023 | | Linux | libpam-winbind Ubuntu 22.04.1 LTS (jammy) | 2:4.15.13+dfsg-0ubuntu1.5 | [libpam-winbind 2:4.15.13+dfsg-0ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libpam-winbind-2-4.15.13-dfsg-0ubuntu1.5.md) | Oct 9, 2023 | | Linux | libsmbclient Ubuntu 22.04.1 LTS (jammy) | 2:4.15.13+dfsg-0ubuntu1.5 | [libsmbclient 2:4.15.13+dfsg-0ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libsmbclient-2-4.15.13-dfsg-0ubuntu1.5.md) | Oct 9, 2023 | | Linux | libwbclient0 Ubuntu 22.04.1 LTS (jammy) | 2:4.15.13+dfsg-0ubuntu1.5 | [libwbclient0 2:4.15.13+dfsg-0ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libwbclient0-2-4.15.13-dfsg-0ubuntu1.5.md) | Oct 9, 2023 | | Linux | python3-samba Ubuntu 22.04.1 LTS (jammy) | 2:4.15.13+dfsg-0ubuntu1.5 | [python3-samba 2:4.15.13+dfsg-0ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-python3-samba-2-4.15.13-dfsg-0ubuntu1.5.md) | Oct 9, 2023 | | Linux | registry-tools Ubuntu 22.04.1 LTS (jammy) | 2:4.15.13+dfsg-0ubuntu1.5 | [registry-tools 2:4.15.13+dfsg-0ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-registry-tools-2-4.15.13-dfsg-0ubuntu1.5.md) | Oct 9, 2023 | | Linux | samba Debian 12.15 (bookworm) | 2:4.17.12+dfsg-0+deb12u1 | [DEBIAN-CVE-2023-42670](https://patchblox.com/security/data/fix/linux/debian-cve-2023-42670.md) | Nov 3, 2023 | | Linux | samba Debian 13.5 (trixie) | 2:4.19.1+dfsg-1 | [DEBIAN-CVE-2023-42670](https://patchblox.com/security/data/fix/linux/debian-cve-2023-42670.md) | Nov 3, 2023 | | Linux | samba Debian 14 | 2:4.19.1+dfsg-1 | [DEBIAN-CVE-2023-42670](https://patchblox.com/security/data/fix/linux/debian-cve-2023-42670.md) | Nov 3, 2023 | | Linux | samba Ubuntu 22.04.1 LTS (jammy) | 2:4.15.13+dfsg-0ubuntu1.5 | [samba 2:4.15.13+dfsg-0ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-samba-2-4.15.13-dfsg-0ubuntu1.5.md) | Oct 9, 2023 | | Linux | samba-common Ubuntu 22.04.1 LTS (jammy) | 2:4.15.13+dfsg-0ubuntu1.5 | [samba-common 2:4.15.13+dfsg-0ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-samba-common-2-4.15.13-dfsg-0ubuntu1.5.md) | Oct 9, 2023 | | Linux | samba-common-bin Ubuntu 22.04.1 LTS (jammy) | 2:4.15.13+dfsg-0ubuntu1.5 | [samba-common-bin 2:4.15.13+dfsg-0ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-samba-common-bin-2-4.15.13-dfsg-0ubuntu1.5.md) | Oct 9, 2023 | | Linux | samba-dsdb-modules Ubuntu 22.04.1 LTS (jammy) | 2:4.15.13+dfsg-0ubuntu1.5 | [samba-dsdb-modules 2:4.15.13+dfsg-0ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-samba-dsdb-modules-2-4.15.13-dfsg-0ubuntu1.5.md) | Oct 9, 2023 | | Linux | samba-libs Ubuntu 22.04.1 LTS (jammy) | 2:4.15.13+dfsg-0ubuntu1.5 | [samba-libs 2:4.15.13+dfsg-0ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-samba-libs-2-4.15.13-dfsg-0ubuntu1.5.md) | Oct 9, 2023 | | Linux | samba-testsuite Ubuntu 22.04.1 LTS (jammy) | 2:4.15.13+dfsg-0ubuntu1.5 | [samba-testsuite 2:4.15.13+dfsg-0ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-samba-testsuite-2-4.15.13-dfsg-0ubuntu1.5.md) | Oct 9, 2023 | | Linux | samba-vfs-modules Ubuntu 22.04.1 LTS (jammy) | 2:4.15.13+dfsg-0ubuntu1.5 | [samba-vfs-modules 2:4.15.13+dfsg-0ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-samba-vfs-modules-2-4.15.13-dfsg-0ubuntu1.5.md) | Oct 9, 2023 | | Linux | smbclient Ubuntu 22.04.1 LTS (jammy) | 2:4.15.13+dfsg-0ubuntu1.5 | [smbclient 2:4.15.13+dfsg-0ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-smbclient-2-4.15.13-dfsg-0ubuntu1.5.md) | Oct 9, 2023 | | Linux | winbind Ubuntu 22.04.1 LTS (jammy) | 2:4.15.13+dfsg-0ubuntu1.5 | [winbind 2:4.15.13+dfsg-0ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-winbind-2-4.15.13-dfsg-0ubuntu1.5.md) | Oct 9, 2023 | --- Data as of 2026-11-08T00:53:09Z UTC. 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