CVE-2000-0831: Buffer overflow in Fastream FTP++ 2.0 allows remote attackers to cause a denial of service and possibly execut

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HIGH 7.5DOWNGRADE

CVE-2000-0831 is a high-severity flaw (CVSS 7.5) affecting ftp\+\+ server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in Fastream FTP++ 2.0 allows remote attackers to cause a denial of service and possibly execute arbitrary commands via a long username.

Why this priority

High severity

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	1.8% (top 21%)
CISA exploited list	No
Published	2000-11-14
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: fastream

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

Am I affected?

Timeline

2000-11-14 05:00 UTCPublished CVE record published
2026-06-16 21:52 UTCUpdated Record last modified

fastream ftp\+\+ server DOWNGRADE

Affected: 2.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.0 (Debian / Ubuntu)

apt-cache madison ftp++-server sudo apt install ftp++-server=<VERSION_BEFORE_2.0> sudo apt-mark hold ftp++-server

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

dnf --showduplicates list ftp++-server sudo dnf downgrade ftp++-server-<VERSION_BEFORE_2.0> sudo dnf versionlock add 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.

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-2000-0831?

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

Is CVE-2000-0831 being exploited?

CVE-2000-0831 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-2000-0831 affect?

CVE-2000-0831 affects ftp\+\+ server. Severity is high (CVSS 7.5). Buffer overflow in Fastream FTP++ 2.0 allows remote attackers to cause a denial of service and possibly execute arbitrary commands via a long username.

How urgent is CVE-2000-0831?

Priority 46/100. High severity

Related CVEs

CVE-2001-0256 HIGH 7.5 DOWNGRADE FaSTream FTP++ Server 2.0 allows remote attackers to cause a denial of service, and possibly execute arbitrary
CVE-2001-0254 MEDIUM 5.0 DOWNGRADE FaSTream FTP++ Server 2.0 allows remote attackers to obtain the real pathname of the server via the "pwd" comm

References

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