CVE-1999-0990

Summary

CVE-1999-0990 refers to a vulnerability in the GDM (GNOME Display Manager) software, specifically with the VerboseAuth setting. This issue allows attackers to obtain error messages containing valid usernames, enabling them to identify existing user accounts on the targeted system. This information could be used for further unauthorized access attempts, making it essential for system administrators to disable the VerboseAuth feature or update their GDM software to a secure version.

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