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...
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.
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2000-0453- CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2000-0453- Updated
- 2026-11-02
EUVDEUVD-2000-0452 No score
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.
- Record
EUVD-2000-0452- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-3vr3-fvrq-86x3 No score
XFree86 3.3.x and 4.0 allows a user to cause a denial of service via a negative counter value in...
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.
- Record
GHSA-3vr3-fvrq-86x3- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | XFree86 X11R6 3.3.5/3.3.6/4.0 Xserver - Denial of Service | 2000-05-18 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, Exploit-DB, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2000-0453 is a medium vulnerability (CVSS 5.0) in Xfree86 Project X11r6, published May 18, 2000. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 2.96%, the 87th percentile. No source names a fixed version.