CVE-2003-0549

The X Display Manager Control Protocol (XDMCP) support for GDM before 2.4.1.6 allows attackers to cause a denial of service (daemon crash) via a short authorization key name.

Published: 2003-08-27 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2003-0549 is rated Moderate Risk (44/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.60%). Review affected assets and schedule remediation.

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

Exploit prediction scoring system (EPSS) score for CVE-2003-0549

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 2025-12-23 0.70% 0.60% -0.10%
2 2025-12-10 0.60% 0.70% +0.10%
3 2025-11-05 — 0.60% —

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2003-0549

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P 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:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2003-0549

OS Trackers for CVE-2003-0549

vendor priority summary link
redhat low — https://access.redhat.com/security/cve/CVE-2003-0549

Affected software / configurations for CVE-2003-0549

Vendor Product Version Raw CPE
gnome gdm 2.2.0 cpe:2.3:a:gnome:gdm:2.2.0:*:*:*:*:*:*:*
gnome gdm 2.4.1 cpe:2.3:a:gnome:gdm:2.4.1:*:*:*:*:*:*:*
gnome gdm 2.4.1.1 cpe:2.3:a:gnome:gdm:2.4.1.1:*:*:*:*:*:*:*
gnome gdm 2.4.1.2 cpe:2.3:a:gnome:gdm:2.4.1.2:*:*:*:*:*:*:*
gnome gdm 2.4.1.3 cpe:2.3:a:gnome:gdm:2.4.1.3:*:*:*:*:*:*:*
gnome gdm 2.4.1.4 cpe:2.3:a:gnome:gdm:2.4.1.4:*:*:*:*:*:*:*
gnome gdm 2.4.1.5 cpe:2.3:a:gnome:gdm:2.4.1.5:*:*:*:*:*:*:*
gnome gdm 2.4.1.6 cpe:2.3:a:gnome:gdm:2.4.1.6:*:*:*:*:*:*:*
redhat kdebase 2.0_beta2.45 cpe:2.3:a:redhat:kdebase:2.0_beta2.45:*:i386:*:*:*:*:*
redhat kdebase 2.0_beta2.45 cpe:2.3:a:redhat:kdebase:2.0_beta2.45:*:ppc:*:*:*:*:*
redhat kdebase 2.2.3.1.20 cpe:2.3:a:redhat:kdebase:2.2.3.1.20:*:i386:*:*:*:*:*
redhat kdebase 2.2.3.1.20 cpe:2.3:a:redhat:kdebase:2.2.3.1.20:*:ia64:*:*:*:*:*
redhat kdebase 2.2.3.1.22 cpe:2.3:a:redhat:kdebase:2.2.3.1.22:*:i386:*:*:*:*:*
redhat kdebase 2.4.0.7.13 cpe:2.3:a:redhat:kdebase:2.4.0.7.13:*:i386:*:*:*:*:*
redhat kdebase 2.4.1.3.5 cpe:2.3:a:redhat:kdebase:2.4.1.3.5:*:i386:*:*:*:*:*
redhat enterprise_linux 2.1 cpe:2.3:o:redhat:enterprise_linux:2.1:*:advanced_server:*:*:*:*:*
redhat enterprise_linux 2.1 cpe:2.3:o:redhat:enterprise_linux:2.1:*:advanced_server_ia64:*:*:*:*:*
redhat enterprise_linux 2.1 cpe:2.3:o:redhat:enterprise_linux:2.1:*:enterprise_server:*:*:*:*:*
redhat enterprise_linux 2.1 cpe:2.3:o:redhat:enterprise_linux:2.1:*:enterprise_server_ia64:*:*:*:*:*
redhat enterprise_linux 2.1 cpe:2.3:o:redhat:enterprise_linux:2.1:*:workstation:*:*:*:*:*
redhat enterprise_linux 2.1 cpe:2.3:o:redhat:enterprise_linux:2.1:*:workstation_ia64:*:*:*:*:*
redhat linux_advanced_workstation 2.1 cpe:2.3:o:redhat:linux_advanced_workstation:2.1:*:*:*:*:*:*:*

References for CVE-2003-0549

cvelogic Threat Intelligence