CVE-2000-0453

Name: CVE-2000-0453
Creator: NVD / NIST
Published: 2000-05-18T04:00:00+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 2.96%

Last modified Jun 16, 2026

CVE-2000-0453 is a vulnerability of currently unknown severity. XFree86 3.3.x and 4.0 allows a user to cause a denial of service via a negative counter value in a malformed TCP packet that is sent to port 6000.. EPSS estimates a 2.96% chance of exploitation in the next 30 days.

Description

XFree86 3.3.x and 4.0 allows a user to cause a denial of service via a negative counter value in a malformed TCP packet that is sent to port 6000.

Metrics

EPSS Probability

2.96%

85.5th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Xfree86 Project	X11r6	3.3.5
Xfree86 Project	X11r6	3.3.6
Xfree86 Project	X11r6	4.0

References

Timeline

Published: May 18, 2000
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2000-0453?

XFree86 3.3.x and 4.0 allows a user to cause a denial of service via a negative counter value in a malformed TCP packet that is sent to port 6000.

How severe is CVE-2000-0453?

Severity scoring for CVE-2000-0453 is pending analysis. The EPSS model estimates a 2.96% probability of exploitation in the next 30 days.

How do I fix CVE-2000-0453?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2000-0453?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST