CVE-1999-0990

Low

Published: 05/12/1999(UTC)Updated: 16/06/2026(UTC)Translated: 18/06/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.42%

33th percentile — higher than 33% of all known CVEs

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

The potential exposure of user information may lead to further attacks on the system, increasing the risk of unauthorized access.

It is recommended to disable the VerboseAuth setting in gdm to minimize the risk of exposing user information.

Original NVD description (English source)

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