All vulnerabilities

Servers and applications

CVE-2023-3347

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…

Severity
Medium 5.9
Published
20 Jul 2023
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
4.17.10, 4.18.5
Sources
NVD

Affected software

SoftwareAffected versions
SambaServers and applications · cpe:a:samba:samba
  • From 4.17.0 before 4.17.10
  • From 4.18.0 before 4.18.5

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2023-3347
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2023-3347