CVE-2023-3347
MEDIUM severity · CVSS 5.9 · CWE-347
5.9CVSS MEDIUM
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityHigh
Privileges requiredNone
User interactionNone
Confidentiality impactNone
Integrity impactHigh
Availability impactNone
Exploit probability (EPSS)0%
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Affected products we track (3)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Additional information
- NVD record
- https://www.samba.org/samba/security/CVE-2023-3347.htmlAdvisory
- https://access.redhat.com/errata/RHSA-2023:4325Advisory
- https://access.redhat.com/errata/RHSA-2023:4328Advisory
- https://access.redhat.com/security/cve/CVE-2023-3347Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2222792Advisory