CVE-2004-2309: Directory traversal vulnerability in Crob FTP Server 3.5.1 allows local users to browse outside the FTP root v

Routine

LOW 2.1DOWNGRADE

CVE-2004-2309 is a low-severity flaw (CVSS 2.1) affecting crob ftp server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Directory traversal vulnerability in Crob FTP Server 3.5.1 allows local users to browse outside the FTP root via multiple ../ (dot dot slash) in the DIR command.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	2.1 (Low)
EPSS exploit chance	1.1% (top 33%)
CISA exploited list	No
Published	2004-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: crob

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

Am I affected?

Timeline

2004-12-31 05:00 UTCPublished CVE record published
2026-06-16 22:09 UTCUpdated Record last modified

crob crob ftp server DOWNGRADE

Affected: 3.5.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.5.1

1. Check installed version

apt-cache policy crob-ftp-server || rpm -q crob-ftp-server || crob-ftp-server --version

2. No fixed release: DOWNGRADE to a release before 3.5.1 (Debian / Ubuntu)

apt-cache madison crob-ftp-server sudo apt install crob-ftp-server=<VERSION_BEFORE_3.5.1> sudo apt-mark hold crob-ftp-server

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

dnf --showduplicates list crob-ftp-server sudo dnf downgrade crob-ftp-server-<VERSION_BEFORE_3.5.1> sudo dnf versionlock add crob-ftp-server

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: Crob FTP Server 3.5.1 - Remote Information Disclosure

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-2004-2309?

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

Is CVE-2004-2309 being exploited?

CVE-2004-2309 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-2004-2309 affect?

CVE-2004-2309 affects crob ftp server. Severity is low (CVSS 2.1). Directory traversal vulnerability in Crob FTP Server 3.5.1 allows local users to browse outside the FTP root via multiple ../ (dot dot slash) in the DIR command.

How urgent is CVE-2004-2309?

Priority 29/100. Public exploit reference

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References

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