#VU58098 Improper access control in Samba


Published: 2021-11-10 | Updated: 2022-07-27

Vulnerability identifier: #VU58098

Vulnerability risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-2124

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Samba
Server applications / Directory software, identity management

Vendor: Samba

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to SMB1 client connections can be downgraded to plaintext authentication. A remote attacker can perform a man-in-the-middle attack and downgrade a negotiated SMB1 client connection and its capabitilities.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Samba: 3.6.0 - 3.6.25, 3.5 - 3.5.22, 3.1 - 3.1.0, 3.4 - 3.4.17, 3.3 - 3.3.16, 3.0 - 3.0.37, 3.2 - 3.2.15, 4.13.0 - 4.13.13, 4.15.0 - 4.15.1, 4.14.0 - 4.14.9, 4.12.0 - 4.12.15, 4.11.0 - 4.11.17, 4.10.0 - 4.10.18, 4.9.0 - 4.9.18, 4.8.0 - 4.8.12, 4.7.0 - 4.7.12, 4.6.0 - 4.6.16, 4.5.0 - 4.5.16, 4.4.0 - 4.4.16, 4.3.0 - 4.3.13, 4.2.0 - 4.2.14, 4.1.0 - 4.1.23, 4.0.0 - 4.0.26


External links
http://www.samba.org/samba/security/CVE-2016-2124.html


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.


Latest bulletins with this vulnerability