CVE-2002-0431: XTux allows remote attackers to cause a denial of service (CPU consumption) via random inputs in the initial c

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MEDIUM 5.0DOWNGRADE

CVE-2002-0431 is a medium-severity flaw (CVSS 5.0) affecting xtux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

XTux allows remote attackers to cause a denial of service (CPU consumption) via random inputs in the initial connection.

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	3.2% (top 12%)
CISA exploited list	No
Published	2002-07-26
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: dave lawrence

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

Am I affected?

Timeline

2002-07-26 04:00 UTCPublished CVE record published
2026-06-16 21:57 UTCUpdated Record last modified

dave lawrence xtux DOWNGRADE

Affected: 2001-06-01

Fixed in: no fixed release known

Safe to downgrade to: a release before 2001-06-01

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2001-06-01 (Debian / Ubuntu)

apt-cache madison xtux sudo apt install xtux=<VERSION_BEFORE_2001-06-01> sudo apt-mark hold xtux

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

dnf --showduplicates list xtux sudo dnf downgrade xtux-<VERSION_BEFORE_2001-06-01> sudo dnf versionlock add xtux

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: XTux Server 2001.0 6.01 - Garbage Denial of Service

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-2002-0431?

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

Is CVE-2002-0431 being exploited?

CVE-2002-0431 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-2002-0431 affect?

CVE-2002-0431 affects xtux. Severity is medium (CVSS 5.0). XTux allows remote attackers to cause a denial of service (CPU consumption) via random inputs in the initial connection.

How urgent is CVE-2002-0431?

Priority 45/100. Public exploit reference

References

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