#VU70384 Use of a broken or risky cryptographic algorithm in Samba - CVE-2022-45141

Vulnerability identifier: #VU70384

Vulnerability risk: High

CVSSv4.0: 7.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2022-45141

CWE-ID: CWE-327

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 bypass authentication.

The vulnerability exists due to an error that allows an attacker to force the server so issue an rc4-hmac ticket encrypted tickets despite the target server supporting better encryption (eg aes256-cts-hmac-sha1-96). A remote attacker can perform an offline attack against the ticket encrypted with rc4-hmac and login as a privileged user.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Samba: 4.15.0 - 4.15.12

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External links
https://www.samba.org/samba/security/CVE-2022-45141.html

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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.