CVE-2004-1327: Buffer overflow in Crystal FTP Client 2.8 allows remote malicious servers to execute arbitrary code via a resp

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HIGH 7.5DOWNGRADE

CVE-2004-1327 is a high-severity flaw (CVSS 7.5) affecting crystal ftp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in Crystal FTP Client 2.8 allows remote malicious servers to execute arbitrary code via a response to a LIST command that contains a file name with a long extension.

Why this priority

High severity
EPSS top 8%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	4.8% (top 8%)
CISA exploited list	No
Published	2004-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: crystal art software

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 22:07 UTCUpdated Record last modified

crystal art software crystal ftp DOWNGRADE

Affected: 2.4 · 2.5 · 2.6 · 2.7 · 2.8

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.4

1. Check installed version

apt-cache policy crystal-ftp || rpm -q crystal-ftp || crystal-ftp --version

2. No fixed release: DOWNGRADE to a release before 2.4 (Debian / Ubuntu)

apt-cache madison crystal-ftp sudo apt install crystal-ftp=<VERSION_BEFORE_2.4> sudo apt-mark hold crystal-ftp

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

dnf --showduplicates list crystal-ftp sudo dnf downgrade crystal-ftp-<VERSION_BEFORE_2.4> sudo dnf versionlock add crystal-ftp

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: CrystalFTP Pro 2.8 - Remote 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-2004-1327?

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

Is CVE-2004-1327 being exploited?

CVE-2004-1327 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-2004-1327 affect?

CVE-2004-1327 affects crystal ftp. Severity is high (CVSS 7.5). Buffer overflow in Crystal FTP Client 2.8 allows remote malicious servers to execute arbitrary code via a response to a LIST command that contains a file name with a long extension.

How urgent is CVE-2004-1327?

Priority 54/100. High severity; EPSS top 8%: very likely to be exploited; Public exploit reference

References

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