MitM attack in Samba



Published: 2022-09-13
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2022-32743
CWE-ID CWE-276
Exploitation vector Local network
Public exploit N/A
Vulnerable software
Subscribe 		Samba
Server applications / Directory software, identity management

Vendor Samba

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Incorrect default permissions

EUVDB-ID: #VU67271

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2022-32743

CWE-ID: CWE-276 - Incorrect Default Permissions

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists due to Samba does not validate the Validated-DNS-Host-Name for the dNSHostName attribute. A remote attacker can set an arbitrary hostname and perform MitM attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Samba: 4.16.0 - 4.16.4, 4.15.0 - 4.15.9, 4.14.0 - 4.14.14, 4.13.0 - 4.13.17, 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

CPE2.3 External links

http://bugzilla.samba.org/show_bug.cgi?id=14833
http://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-adts/5c578b15-d619-408d-ba17-380714b89fd1

Q & A

Can this vulnerability be exploited remotely?

How the attacker can exploit this vulnerability?

Is there known malware, which exploits this vulnerability?



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