CVE-1999-1231
MediumExploitation Probability (EPSS)
Elevated risk70th percentile - higher than 70% of all known CVEs
Summary
ssh version 2.0.12, and possibly other versions, allows valid usernames to attempt to enter the correct password multiple times, but only prompts for a password once for an invalid username. This allows remote attackers to determine user account names on the server.
Risk Assessment
Attackers can identify existing user accounts, increasing the risk of further attacks such as password guessing attempts.
Recommendation
It is recommended to update the ssh software to the latest version to minimize the risk associated with username disclosure.
Original NVD description (English source)
ssh 2.0.12, and possibly other versions, allows valid user names to attempt to enter the correct password multiple times, but only prompts an invalid user name for a password once, which allows remote attackers to determine user account names on the server.