CVE-2000-0943: Buffer overflow in bftp daemon (bftpd) 1.0.11 allows remote attackers to cause a denial of service and possibl

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HIGH 7.5DOWNGRADE

CVE-2000-0943 is a high-severity flaw (CVSS 7.5) affecting bftpd. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in bftp daemon (bftpd) 1.0.11 allows remote attackers to cause a denial of service and possibly execute arbitrary commands via a long USER command.

Why this priority

High severity
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	3.8% (top 10%)
CISA exploited list	No
Published	2000-12-19
Last modified	2026-09-23

Publisher (CNA): MITRE · Vendor: max-wilhelm bruker

Last updated 2026-09-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2000-12-19 05:00 UTCPublished CVE record published
2026-09-23 10:10 UTCUpdated Record last modified

max-wilhelm bruker bftpd DOWNGRADE

Affected: 1.0.11

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.11

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.0.11 (Debian / Ubuntu)

apt-cache madison bftpd sudo apt install bftpd=<VERSION_BEFORE_1.0.11> sudo apt-mark hold bftpd

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list bftpd sudo dnf downgrade bftpd-<VERSION_BEFORE_1.0.11> sudo dnf versionlock add bftpd

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2000-0943?

bftpd: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2000-0943 being exploited?

CVE-2000-0943 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-2000-0943 affect?

CVE-2000-0943 affects bftpd. Severity is high (CVSS 7.5). Buffer overflow in bftp daemon (bftpd) 1.0.11 allows remote attackers to cause a denial of service and possibly execute arbitrary commands via a long USER command.

How urgent is CVE-2000-0943?

Priority 54/100. High severity; Public exploit reference

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CVE-2009-4593 MEDIUM 5.0 UPGRADE The bftpdutmp_log function in bftpdutmp.c in Bftpd before 2.4 does not place a '\0' character at the end of th
CVE-2007-2051 MEDIUM 5.0 DOWNGRADE Buffer overflow in the parsecmd function in bftpd before 1.8 has unknown impact and attack vectors related to

References

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