VDB-14688 · CVE-1999-1231 · XFDB 2276

SSH up to 2.0.12 Lockout Mechanism privileges management

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.1	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in SSH up to 2.0.12. This vulnerability affects unknown code of the component Lockout Mechanism. The manipulation results in privileges management. This vulnerability was named CVE-1999-1231. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in SSH up to 2.0.12 (SSH Server Software). Affected is some unknown functionality of the component Lockout Mechanism. The manipulation with an unknown input leads to a privileges management vulnerability. CWE is classifying the issue as CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. This is going to have an impact on confidentiality. CVE summarizes:

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.

The weakness was presented 06/09/1999 as not defined posting (Bugtraq). The advisory is shared for download at securityfocus.com. This vulnerability is traded as CVE-1999-1231. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (2276) and Vulnerability Center (SBV-5945†). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

SSH Server Software

Name

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
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Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Privileges management
CWE: CWE-269 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

06/09/1999 🔍
06/09/1999 +0 days 🔍
06/09/1999 +0 days 🔍
11/23/2004 +1994 days 🔍
06/21/2014 +3497 days 🔍
04/19/2026 +4320 days 🔍

Sourcesinfo

Advisory: securityfocus.com⛔
Status: Confirmed

CVE: CVE-1999-1231 (🔍)
GCVE (CVE): GCVE-0-1999-1231
GCVE (VulDB): GCVE-100-14688
X-Force: 2276
Vulnerability Center: 5945 - SSH Server Reveals Valid User Names, Low

Entryinfo

Created: 06/21/2014 10:22
Updated: 04/19/2026 04:34
Changes: 06/21/2014 10:22 (38), 05/26/2019 09:22 (16), 04/19/2026 04:34 (18)
Complete: 🔍
Cache ID: 216::103

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