Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

CVE-1999-1231

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.

Security Impact Summary

CVE-1999-1231 is a security vulnerability that . Impacting 1 product from ssh organizations running these solutions should prioritize assessment and patching.

Historical Context

Originally identified in 1999, this vulnerability predates many modern security frameworks and practices. The vulnerability landscape of that era was characterized by different threat models and less mature defense mechanisms compared to contemporary standards.

Published

1999-06-09T04:00:00.000

Last Modified

2025-04-03T01:03:51.193

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 5.0 (MEDIUM)

CVSSv2 Vector

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

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: NONE
Availability Impact: NONE

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Primary
NVD-CWE-Other

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	ssh	ssh2	2.0	Yes
Application	ssh	ssh2	2.0.1	Yes
Application	ssh	ssh2	2.0.2	Yes
Application	ssh	ssh2	2.0.3	Yes
Application	ssh	ssh2	2.0.4	Yes
Application	ssh	ssh2	2.0.5	Yes
Application	ssh	ssh2	2.0.6	Yes
Application	ssh	ssh2	2.0.7	Yes
Application	ssh	ssh2	2.0.8	Yes
Application	ssh	ssh2	2.0.9	Yes
Application	ssh	ssh2	2.0.10	Yes
Application	ssh	ssh2	2.0.11	Yes
Application	ssh	ssh2	2.0.12	Yes

References

http://www.securityfocus.com/archive/1/14758 Exploit, Patch, Vendor Advisory ([email protected])
https://exchange.xforce.ibmcloud.com/vulnerabilities/2276 ([email protected])
http://www.securityfocus.com/archive/1/14758 Exploit, Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://exchange.xforce.ibmcloud.com/vulnerabilities/2276 (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For ssh's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.