A vulnerability was found in Sambas SMB2 packet signing mechanism. The SMB2 packet signing is not enforced if an admin configured server signing = required or for SMB2 connections to Domain Controllers where SMB2 packet signing is mandatory. This flaw allows an attacker to perform attacks, such as a man-in-the-middle attack, by intercepting the network traffic and modifying the SMB2 messages between client and server, affecting the integrity of the data.
The product does not verify, or incorrectly verifies, the cryptographic signature for data.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Samba | Samba | 4.17.0 (including) | 4.17.10 (excluding) |
| Samba | Samba | 4.18.0 (including) | 4.18.5 (excluding) |
| Red Hat Enterprise Linux 8 | RedHat | samba-0:4.17.5-3.el8_8 | * |
| Red Hat Enterprise Linux 8 | RedHat | samba-0:4.17.5-3.el8_8 | * |
| Red Hat Enterprise Linux 9 | RedHat | samba-0:4.17.5-103.el9_2 | * |
| Red Hat Enterprise Linux 9 | RedHat | samba-0:4.17.5-103.el9_2 | * |
| Samba | Ubuntu | bionic | * |
| Samba | Ubuntu | devel | * |
| Samba | Ubuntu | lunar | * |
| Samba | Ubuntu | trusty | * |
| Samba | Ubuntu | xenial | * |