Linux Kernel User User Name improper authentication

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability, which was classified as problematic, was found in Linux Kernel (Operating System). Affected is an unknown code of the component User Handler. The manipulation with the input value + leads to a weak authentication vulnerability. CWE is classifying the issue as CWE-287. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

some configurations of nis+ in linux allowed attackers to log in as the user "+".

The issue has been introduced in 02/05/2007. The weakness was published 09/07/1995. This vulnerability is traded as CVE-1999-0245. The exploitability is told to be easy. Local access is required to approach this attack. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 05/08/2019). This vulnerability has a historic impact due to its background and reception.

Upgrading eliminates this vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 623.

The vulnerability is also documented in the databases at X-Force (307) and Vulnerability Center (SBV-702).





CPE 2.3infoedit

CPE 2.2infoedit


VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.7

VulDB Base Score: 5.9
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍



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

NVD Base Score: 🔍


Class: Weak authentication
CWE: CWE-287
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔍


Threat Intelligenceinfoedit

Threat: 🔍
Adversaries: 🔍
Geopolitics: 🔍
Economy: 🔍
Predictions: 🔍
Remediation: 🔍


Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
TippingPoint: 🔍


09/07/1995 🔍
09/07/1995 +0 days 🔍
09/07/1995 +0 days 🔍
01/23/2003 +2695 days 🔍
02/05/2007 +1474 days 🔍
06/17/2014 +2689 days 🔍
04/15/2016 +668 days 🔍
05/08/2019 +1118 days 🔍



Status: Not defined

CVE: CVE-1999-0245 (🔍)
X-Force: 307
Vulnerability Center: 702 - Linux NIS/yp could treat \x27+\x27 user as a normal login account, Medium


Created: 06/17/2014 04:38 PM
Updated: 05/08/2019 10:05 AM
Changes: (1) source_tippingpoint_id
Complete: 🔍


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