CVE-2023-3347
moderate-risk
Published 2023-07-20
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.
Do I need to act?
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0.42% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.9/10
Medium
NETWORK
/ HIGH complexity
Affected Products (5)
Affected Vendors
References (14)
Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:4325
Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:4328
Third Party Advisory
https://access.redhat.com/security/cve/CVE-2023-3347
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2222792
Vendor Advisory
https://www.samba.org/samba/security/CVE-2023-3347.html
Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:4325
Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:4328
Third Party Advisory
https://access.redhat.com/security/cve/CVE-2023-3347
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2222792
Vendor Advisory
https://www.samba.org/samba/security/CVE-2023-3347.html
32
/ 100
moderate-risk
Severity
18/34 · Moderate
Exploitability
2/34 · Minimal
Exposure
12/34 · Low