CVE-2023-3347
Last modified
CVE-2023-3347 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. 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. EPSS estimates a 0.39% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Samba | Samba | >= 4.17.0, < 4.17.10 |
| Samba | Samba | >= 4.18.0, < 4.18.5 |
| Redhat | Storage | 3.0 |
| Redhat | Enterprise Linux | 8.0 |
| Redhat | Enterprise Linux | 9.0 |
| Fedoraproject | Fedora | 38 |
References
- https://access.redhat.com/errata/RHSA-2023:4325Third Party Advisory
- https://access.redhat.com/errata/RHSA-2023:4328Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2023-3347Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2222792Issue Tracking, Third Party Advisory
- https://www.samba.org/samba/security/CVE-2023-3347.htmlVendor Advisory
- https://access.redhat.com/errata/RHSA-2023:4325Third Party Advisory
- https://access.redhat.com/errata/RHSA-2023:4328Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2023-3347Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2222792Issue Tracking, Third Party Advisory
- https://www.samba.org/samba/security/CVE-2023-3347.htmlVendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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