VDB-14651 · CVE-1999-1029 · XFDB 2193

SSH up to 2.0.11 improper authentication

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.
7.3	$0-$5k	0.00

Summaryinfo

A vulnerability was found in SSH up to 2.0.11. It has been rated as critical. Affected is an unknown function. The manipulation leads to improper authentication. This vulnerability is documented as CVE-1999-1029. There is not any exploit available.

Detailsinfo

A vulnerability was found in SSH up to 2.0.11 (SSH Server Software). It has been rated as critical. This issue affects an unknown function. The manipulation with an unknown input leads to a improper authentication vulnerability. Using CWE to declare the problem leads to CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

SSH server (sshd2) before 2.0.12 does not properly record login attempts if the connection is closed before the maximum number of tries, allowing a remote attacker to guess the password without showing up in the audit logs.

The weakness was released 05/13/1999 by Zhodiac (Website). It is possible to read the advisory at xforce.iss.net. The identification of this vulnerability is CVE-1999-1029. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at X-Force (2193), SecurityFocus (BID 277†) and Vulnerability Center (SBV-5538†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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: 7.3
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.3
VulDB Temp Score: 7.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

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

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

NVD Base Score: 🔍

Exploitinginfo

Class: Improper authentication
CWE: CWE-287
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: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

05/13/1999 🔍
05/13/1999 +0 days 🔍
05/13/1999 +0 days 🔍
05/13/1999 +0 days 🔍
10/12/2004 +1979 days 🔍
06/20/2014 +3538 days 🔍
04/19/2026 +4321 days 🔍

Sourcesinfo

Advisory: xforce.iss.net
Researcher: Zhodiac
Status: Not defined

CVE: CVE-1999-1029 (🔍)
GCVE (CVE): GCVE-0-1999-1029
GCVE (VulDB): GCVE-100-14651
X-Force: 2193
SecurityFocus: 277 - Secure Shell Password Brute Force Vulnerability
Vulnerability Center: 5538 - SSH Secure Shell Server <2.0.12 Improper Recording of Login Attempts, High

Entryinfo

Created: 06/21/2014 00:22
Updated: 04/19/2026 03:22
Changes: 06/21/2014 00:22 (55), 05/25/2019 10:09 (2), 04/19/2026 03:22 (16)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.