Missing authorization in NetBSD tnftpd

1) Missing Authorization

EUVDB-ID: #VU83295

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

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

CPE2.3

• cpe:2.3:o:netbsd_foundation:netbsd:8.0:*:*:*:*:*:*:*
• cpe:2.3:o:netbsd_foundation:netbsd:8.1:*:*:*:*:*:*:*
• cpe:2.3:o:netbsd_foundation:netbsd:8.2:*:*:*:*:*:*:*

External links

https://mail-index.netbsd.org/source-changes/2023/09/22/msg147669.html
https://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.