CVE-2005-2239: oftpd 0.3.7 allows remote attackers to cause a denial of service via a USER command with a large number of nul

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MEDIUM 5.0DOWNGRADE

CVE-2005-2239 is a medium-severity flaw (CVSS 5.0) affecting oftpd. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

oftpd 0.3.7 allows remote attackers to cause a denial of service via a USER command with a large number of null (\0) characters.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	3.4% (top 11%)
CISA exploited list	No
Published	2005-07-12
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: oftpd

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

Am I affected?

Timeline

2005-07-12 04:00 UTCPublished CVE record published
2026-06-16 22:14 UTCUpdated Record last modified

oftpd oftpd DOWNGRADE

Affected: 0.3.7

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.3.7

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.3.7 (Debian / Ubuntu)

apt-cache madison oftpd sudo apt install oftpd=<VERSION_BEFORE_0.3.7> sudo apt-mark hold oftpd

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

dnf --showduplicates list oftpd sudo dnf downgrade oftpd-<VERSION_BEFORE_0.3.7> sudo dnf versionlock add oftpd

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: OFTPD 0.3.x - User Command Buffer Overflow

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-2005-2239?

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

Is CVE-2005-2239 being exploited?

CVE-2005-2239 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-2005-2239 affect?

CVE-2005-2239 affects oftpd. Severity is medium (CVSS 5.0). oftpd 0.3.7 allows remote attackers to cause a denial of service via a USER command with a large number of null (\0) characters.

How urgent is CVE-2005-2239?

Priority 45/100. Public exploit reference

Related CVEs

CVE-2006-6767 HIGH 7.5 UPGRADE oftpd before 0.3.7 allows remote attackers to cause a denial of service (daemon abort) via a (1) LPRT or (2) L
CVE-2004-0376 MEDIUM 5.0 UPGRADE oftpd 0.3.6 and earlier allows remote attackers to cause a denial of service (crash) via a PORT command with a

References

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