CVE-2012-6067: freeFTPd.exe in freeFTPd through 1.0.11 allows remote attackers to bypass authentication via a crafted SFTP se

Q: How do I fix CVE-2012-6067?

freeftpd: upgrade to newer than 1.0.11. Exact commands for each OS are on this page.

Q: Is CVE-2012-6067 being exploited?

CVE-2012-6067 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-2012-6067 affect?

CVE-2012-6067 affects freeftpd. Severity is high (CVSS 10.0). freeFTPd.exe in freeFTPd through 1.0.11 allows remote attackers to bypass authentication via a crafted SFTP session, as demonstrated by an OpenSSH client with modified versions of ssh.c and sshconnect2.c.

Q: How urgent is CVE-2012-6067?

Priority 57/100. Critical severity

This month

HIGH 10.0UPGRADE

CVE-2012-6067 is a high-severity flaw (CVSS 10.0) affecting freeftpd. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

freeFTPd.exe in freeFTPd through 1.0.11 allows remote attackers to bypass authentication via a crafted SFTP session, as demonstrated by an OpenSSH client with modified versions of ssh.c and sshconnect2.c.

Why this priority

Critical severity

A fixed release or distro patch exists.

Risk facts

CVSS score	10.0 (High)
EPSS exploit chance	3.1% (top 12%)
CISA exploited list	No
Weakness	CWE-287
Published	2012-12-04
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

2012-12-04 23:55 UTCPublished CVE record published
2026-06-16 23:47 UTCUpdated Record last modified

freeftpd freeftpd UPGRADE

Affected: <= 1.0.11 · 1.0 · 1.0.1 · 1.0.2 · 1.0.3 · 1.0.4 · 1.0.5 · 1.0.6

Fixed in: newer than 1.0.11

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 1.0.11 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade freeftpd

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-2012-6067?

freeftpd: upgrade to newer than 1.0.11. Exact commands for each OS are on this page.

Is CVE-2012-6067 being exploited?

CVE-2012-6067 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-2012-6067 affect?

CVE-2012-6067 affects freeftpd. Severity is high (CVSS 10.0). freeFTPd.exe in freeFTPd through 1.0.11 allows remote attackers to bypass authentication via a crafted SFTP session, as demonstrated by an OpenSSH client with modified versions of ssh.c and sshconnect2.c.

How urgent is CVE-2012-6067?

Priority 57/100. Critical severity

Software pages

OpenSSH vulnerabilities

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References

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