Medium severity · published Jul 20, 2023
CVE-2023-3347
A vulnerability was found in Samba's SMB2 packet signing mechanism
5.9
CVSS
0.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 38% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EL
Enterprise Linux · Redhat
8.0; 9.0 · source: NVD
FE
Fedora · Fedoraproject
38 · source: NVD
SA
Samba · Samba
4.17.0 before 4.17.10; 4.18.0 before 4.18.5 · source: NVD
ST
Storage · Redhat
3.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-3347
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-3347
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
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BPCSGND7LO467AJGR5DYBGZLTCGTOBCC/
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