CVE-2023-42670
Fixed in a distro release EPSS 1%CVSS 6.5
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.
Products: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat Storage 3
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Alpine 3.18 | samba | 4.18.8-r0 |
| Alpine 3.19 | samba | 4.18.8-r0 |
| Alpine 3.20 | samba | 4.18.8-r0 |
| Alpine 3.21 | samba | 4.18.8-r0 |
| Alpine 3.22 | samba | 4.18.8-r0 |
| Alpine 3.23 | samba | 4.18.8-r0 |
| Alpine 3.24 | samba | 4.18.8-r0 |
| Debian 12 | samba | 2:4.17.12+dfsg-0+deb12u1 |
| Debian 13 | samba | 2:4.19.1+dfsg-1 |
| Debian 14 | samba | 2:4.19.1+dfsg-1 |
| SUSE Linux Enterprise High Availability Extension 15 SP5 | samba | 4.17.9+git.421.abde31ca5c2-150500.3.11.1 |
| SUSE Linux Enterprise Micro 5.5 | samba | 4.17.9+git.421.abde31ca5c2-150500.3.11.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP5 | samba | 4.17.9+git.421.abde31ca5c2-150500.3.11.1 |
| Ubuntu 20.04 LTS | samba | 2:4.15.13+dfsg-0ubuntu0.20.04.6 |
| Ubuntu 22.04 LTS | samba | 2:4.15.13+dfsg-0ubuntu1.5 |
| Ubuntu 23.10 | samba | 2:4.18.6+dfsg-1ubuntu2.1 |
| openSUSE Leap 15.5 | samba | 4.17.9+git.421.abde31ca5c2-150500.3.11.1 |
| openSUSE Tumbleweed | samba | 4.19.1+git.312.c912b3d2ef6-1.1 |