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TI-1999-00940 Aliases CVE-1999-0990GHSA-4v4f-rw7f-997r

Error messages generated by gdm with the VerboseAuth setting allows an attacker to identify valid users on a system.

Priority LOW 11Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Partial · None · None
Fix status
No fix listed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA.

Summary

Error messages generated by gdm with the VerboseAuth setting allows an attacker to identify valid users on a system.

Why it matters now

EPSS 0.00413 35th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:gnome:gdm:2.0_beta4:*:*:*:*:*:*:*2.0_beta4VulnerableGNOME
  • cpe:2.3:a:gnome:gdm:2.0_beta4:*:*:*:*:*:*:* Versions 2.0_beta4 Vulnerable ·GNOME

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-1999-0990
  2. 2026-10-03 Alias added: GHSA-4v4f-rw7f-997r

References

—

  • TI-2000-00491 Buffer overflow in the XDMCP parsing code of GNOME gdm, KDE kdm, and wdm allows remote… CVSS 2.0HIGH 10.0
  • TI-2009-02579 The Red Hat build script for the GNOME Display Manager (GDM) before 2.16.0-56 on Red Hat… CVSS 2.0MEDIUM 6.8
  • TI-2011-01488 GNOME Display Manager (gdm) before 2.32.2, when glib 2.28 is used, enables execution of a… CVSS 2.0HIGH 7.2
  • TI-2011-00635 GNOME Display Manager (gdm) 2.x before 2.32.1 allows local users to change the ownership… CVSS 2.0MEDIUM 6.9
  • TI-2000-00503 libICE in XFree86 allows remote attackers to cause a denial of service by specifying a… CVSS 2.0MEDIUM 5.0
  • TI-2003-00517 The X Display Manager Control Protocol (XDMCP) support for GDM before 2.4.1.6 allows… CVSS 2.0MEDIUM 5.0
See all 14 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences