CVE-2023-45198: ftpd before "NetBSD-ftpd 20230930" can leak information about the host filesystem before authentication via an

Q: How do I fix CVE-2023-45198?

ftpd: upgrade to 2023-09-30; tnftpd: upgrade to 2023-10-01. Exact commands for each OS are on this page.

Q: Is CVE-2023-45198 being exploited?

CVE-2023-45198 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-45198 affect?

CVE-2023-45198 affects ftpd, tnftpd. Severity is high (CVSS 7.5). ftpd before "NetBSD-ftpd 20230930" can leak information about the host filesystem before authentication via an MLSD or MLST command. tnftpd (the portable version of NetBSD ftpd) before 20231001 is also vulnerable.

Q: How urgent is CVE-2023-45198?

Priority 43/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADEUPGRADE

CVE-2023-45198 is a high-severity flaw (CVSS 7.5) affecting ftpd, tnftpd. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

ftpd before "NetBSD-ftpd 20230930" can leak information about the host filesystem before authentication via an MLSD or MLST command. tnftpd (the portable version of NetBSD ftpd) before 20231001 is also vulnerable.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 52%)
CISA exploited list	No
Published	2023-10-05
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: netbsd

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-10-05 05:15 UTCPublished CVE record published
2026-06-17 06:28 UTCUpdated Record last modified

netbsd ftpd UPGRADE

Affected: < 2023-09-30

Fixed in: 2023-09-30

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy ftpd || rpm -q ftpd || ftpd --version

2. UPGRADE to 2023-09-30 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ftpd

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ftpd

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

netbsd tnftpd UPGRADE

Affected: < 2023-10-01

Fixed in: 2023-10-01

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy tnftpd || rpm -q tnftpd || tnftpd --version

2. UPGRADE to 2023-10-01 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade tnftpd

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade tnftpd

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-45198?

ftpd: upgrade to 2023-09-30; tnftpd: upgrade to 2023-10-01. Exact commands for each OS are on this page.

Is CVE-2023-45198 being exploited?

CVE-2023-45198 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-45198 affect?

CVE-2023-45198 affects ftpd, tnftpd. Severity is high (CVSS 7.5). ftpd before "NetBSD-ftpd 20230930" can leak information about the host filesystem before authentication via an MLSD or MLST command. tnftpd (the portable version of NetBSD ftpd) before 20231001 is also vulnerable.

How urgent is CVE-2023-45198?

Priority 43/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2013-2512 CRITICAL 9.8 DOWNGRADE The ftpd gem 0.2.1 for Ruby allows remote attackers to execute arbitrary OS commands via shell metacharacters

References

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