Vulnerability Report

CVE-2023-3347

Title: Samba SMB2 Packet Signing Bypass

Data Integrity

Proof Of Concept

No public PoC currently indexed for CVE-2023-3347.

CWE Category CWE-924
Published Date Jul 20, 2023
Modified Date Dec 06, 2024
Exploit Status Not Found
Score 5.9 CVSS v3.1
Exploit Probability (EPSS)
0.45%

Vulnerability Summary

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 between client and server, affecting the integrity of the data.

Impacted Vendors

S
samba 1
S
sgi 1
R
redhat 1
S
storage_project 1

Reference Links

https://access.redhat.com/errata/RHSA-2023:4325 https://access.redhat.com/errata/RHSA-2023:4328 https://access.redhat.com/security/cve/CVE-2023-3347 https://bugzilla.redhat.com/show_bug.cgi?id=2222792 https://www.samba.org/samba/security/CVE-2023-3347.html https://access.redhat.com/errata/RHSA-2023:4325 https://access.redhat.com/errata/RHSA-2023:4328 https://access.redhat.com/security/cve/CVE-2023-3347 https://bugzilla.redhat.com/show_bug.cgi?id=2222792 https://lists.fedoraproject.org/archives/list/[email protected]/message/BPCSGND7LO467AJGR5DYBGZLTCGTOBCC/ https://lists.fedoraproject.org/archives/list/[email protected]/message/OT74M42E6C36W7PQVY3OS4ZM7DVYB64Z/ https://security.netapp.com/advisory/ntap-20230731-0010/ https://www.debian.org/security/2023/dsa-5477 https://www.samba.org/samba/security/CVE-2023-3347.html
CVSS v3.1
Source Entity [email protected]
Severity MEDIUM
5.9
Attack Vector
NETWORK
Complexity
HIGH
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS v3.1
Source Entity [email protected]
Severity MEDIUM
5.9
Attack Vector
NETWORK
Complexity
HIGH
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2023-3347 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity HIGH
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected Stack

No specific products linked.