CVE-1999-1231

Medium CVSS 5

Published 1999-06-09 · last changed 2026-06-16

The fix

We hold no Microsoft remediation data for CVE-1999-1231, which normally means it is not a Windows CVE. For non-Microsoft software the fix is the vendor's own updated release, and the affected versions are listed below.

What it is

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.

Sources

NVD record for CVE-1999-1231

CVSS vector: AV:N/AC:L/Au:N/C:P/I:N/A:N