CVE-2005-3812: freeFTPd 1.0.10 allows remote authenticated users to cause a denial of service (null dereference and crash) vi

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MEDIUM 6.8DOWNGRADE

CVE-2005-3812 is a medium-severity flaw (CVSS 6.8) affecting freeftpd. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

freeFTPd 1.0.10 allows remote authenticated users to cause a denial of service (null dereference and crash) via a PORT command with missing arguments.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.8 (Medium)
EPSS exploit chance	3.0% (top 13%)
CISA exploited list	No
Published	2005-11-26
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: freeftpd

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2005-11-26 02:03 UTCPublished CVE record published
2026-06-16 22:17 UTCUpdated Record last modified

freeftpd freeftpd DOWNGRADE

Affected: 1.0.10

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.10

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.0.10 (Debian / Ubuntu)

apt-cache madison freeftpd sudo apt install freeftpd=<VERSION_BEFORE_1.0.10> sudo apt-mark hold freeftpd

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

dnf --showduplicates list freeftpd sudo dnf downgrade freeftpd-<VERSION_BEFORE_1.0.10> sudo dnf versionlock add freeftpd

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: freeFTPd 1.0.10 - 'PORT' Denial of Service

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-2005-3812?

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

Is CVE-2005-3812 being exploited?

CVE-2005-3812 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-2005-3812 affect?

CVE-2005-3812 affects freeftpd. Severity is medium (CVSS 6.8). freeFTPd 1.0.10 allows remote authenticated users to cause a denial of service (null dereference and crash) via a PORT command with missing arguments.

How urgent is CVE-2005-3812?

Priority 51/100. Public exploit reference

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References

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