A vulnerability was found in Samba's 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.
The product establishes a communication channel with an endpoint and receives a message from that endpoint, but it does not sufficiently ensure that the message was not modified during transmission.
| Link | Tags |
|---|---|
| https://access.redhat.com/errata/RHSA-2023:4325 | third party advisory vendor advisory |
| https://access.redhat.com/errata/RHSA-2023:4328 | third party advisory vendor advisory |
| https://access.redhat.com/security/cve/CVE-2023-3347 | third party advisory vdb entry |
| https://bugzilla.redhat.com/show_bug.cgi?id=2222792 | third party advisory issue tracking |
| https://www.samba.org/samba/security/CVE-2023-3347.html | vendor advisory |
| https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BPCSGND7LO467AJGR5DYBGZLTCGTOBCC/ | |
| https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OT74M42E6C36W7PQVY3OS4ZM7DVYB64Z/ | |
| https://security.netapp.com/advisory/ntap-20230731-0010/ | |
| https://www.debian.org/security/2023/dsa-5477 |