Missing authorization in NetBSD tnftpd

1) Missing Authorization

EUVDB-ID: #VU83295

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-45198

CWE-ID: CWE-862 - Missing Authorization

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to missing authorization in tnftpd (the portable version of NetBSD ftpd). A remote non-authenticated attacker can use the MLSD and MLST commands to download arbitrary files from the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

NetBSD: 8.0 - 10

External links

http://mail-index.netbsd.org/source-changes/2023/09/22/msg147669.html
http://cvsweb.netbsd.org/bsdweb.cgi/src/libexec/ftpd/ftpcmd.y.diff?r1=1.94&r2=1.95

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.