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CVE-2000-0453

23
FAUCET Score

CVE-2000-0453 describes a denial-of-service vulnerability affecting XFree86 versions 3.3.x and 4.0. An unauthenticated attacker can exploit this by sending a specially crafted TCP packet with a negative counter value to port 6000, causing the X server to crash. This vulnerability has a CVSS score of 5.0 (Medium) due to its network-based attack vector and low attack complexity, leading to a partial availability impact. While there is no evidence of active exploitation, a public exploit (EDB-19950) exists, though it has received minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
3.3.5CPE matchmatch criteria
cpe:2.3:a:xfree86_project:x11r6:3.3.5:*:*:*:*:*:*:*
3.3.6CPE matchmatch criteria
cpe:2.3:a:xfree86_project:x11r6:3.3.6:*:*:*:*:*:*:*
4.0CPE matchmatch criteria
cpe:2.3:a:xfree86_project:x11r6:4.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.96%
Probability of exploitation in next 30 days
EPSS Percentile
85.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
ExploitDB: EDB-19950 · May 18, 2000
This CVE's current EPSS score of 0.0296 is in the 80th percentile among its peer group of 23,703 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

ftp.caldera.com / pub/security/OpenLinux/CSSA-2000-012.0.txt
archives.neohapsis.com / archives/bugtraq/2000-05/0223.html
securityfocus.com / bid/1235