CVE-2023-3347
Published: 19 July 2023
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.
Notes
| Author | Note |
|---|---|
| mdeslaur | 4.17.0 and higher only |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
samba Launchpad, Ubuntu, Debian |
trusty |
Not vulnerable
|
| xenial |
Not vulnerable
|
|
| bionic |
Not vulnerable
|
|
| focal |
Not vulnerable
(2:4.15.13+dfsg-0ubuntu0.20.04.2)
|
|
| jammy |
Not vulnerable
(2:4.15.13+dfsg-0ubuntu1.1)
|
|
| kinetic |
Not vulnerable
(2:4.16.8+dfsg-0ubuntu1.1)
|
|
| lunar |
Released
(2:4.17.7+dfsg-1ubuntu1.1)
|
|
| upstream |
Needs triage
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.9 |
| Attack vector | Network |
| Attack complexity | High |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | High |
| Availability impact | None |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N |