CVE-2000-0491

Exp

Buffer overflow in the XDMCP parsing code of GNOME gdm, KDE kdm, and wdm allows remote attackers to execute arbitrary commands or cause a denial of service via a long FORWARD_QUERY request.

Published: 2000-05-24 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2000-0491 is rated High Exploit Risk (84.1/100): CVSS Critical severity, with high exploitation likelihood (EPSS 6.92%, 91th percentile). 2 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2000-0491

EDB-ID Source Kind Published Link
19948 exploit_db edb 2000-05-22 Exploit-DB ↗
19947 exploit_db edb 2000-05-22 Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2000-0491

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 9.53% 6.92% -2.61%
2 2025-03-29 6.92% 9.53% +2.61%
3 2025-03-19 — 6.92% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2000-0491

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
10.0 2.0 HIGH
AV:N/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 10.0 [email protected]

Weakness enumeration for CVE-2000-0491

OS Trackers for CVE-2000-0491

vendor priority summary link
redhat — — https://access.redhat.com/security/cve/CVE-2000-0491

Affected software / configurations for CVE-2000-0491

Vendor Product Version Raw CPE
gnome gdm 1.0 cpe:2.3:a:gnome:gdm:1.0:*:*:*:*:*:*:*
caldera openlinux — cpe:2.3:o:caldera:openlinux:*:*:*:*:*:*:*:*
suse suse_linux 6.2 cpe:2.3:o:suse:suse_linux:6.2:*:*:*:*:*:*:*
suse suse_linux 6.4 cpe:2.3:o:suse:suse_linux:6.4:*:*:*:*:*:*:*

References for CVE-2000-0491

cvelogic Threat Intelligence