CVE-1999-1231
ssh 2.0.12, and possibly other versions, allows valid user names to attempt to enter the correct...
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.
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-1999-1231- CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:P/I:N/A:N - Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-1999-1231- Updated
- 2026-11-02
EUVDEUVD-1999-1212 No score
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.
- Record
EUVD-1999-1212- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-7g97-5hq7-x7mm No score
ssh 2.0.12, and possibly other versions, allows valid user names to attempt to enter the correct...
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.
- Record
GHSA-7g97-5hq7-x7mm- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-1999-1231 is a medium vulnerability (CVSS 5.0) in Ssh Ssh2, published June 9, 1999. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.46%, the 73rd percentile. No source names a fixed version.