// For flags

CVE-2000-0453

XFree86 X11R6 3.3.5/3.3.6/4.0 Xserver - Denial of Service

Severity Score

7.5
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2000-05-18 CVE Published
  • 2000-05-18 First Exploit
  • 2000-06-14 CVE Reserved
  • 2024-08-08 CVE Updated
  • 2025-03-30 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Xfree86 Project
Search vendor "Xfree86 Project"
 X11r6
Search vendor "Xfree86 Project" for product "X11r6"
 3.3.5
Search vendor "Xfree86 Project" for product "X11r6" and version "3.3.5"
-
Affected
Xfree86 Project
Search vendor "Xfree86 Project"
 X11r6
Search vendor "Xfree86 Project" for product "X11r6"
 3.3.6
Search vendor "Xfree86 Project" for product "X11r6" and version "3.3.6"
-
Affected
Xfree86 Project
Search vendor "Xfree86 Project"
 X11r6
Search vendor "Xfree86 Project" for product "X11r6"
 4.0
Search vendor "Xfree86 Project" for product "X11r6" and version "4.0"
-
Affected