VDB-14892 · CVE-1999-1346 · GCVE-0-1999-1346

Red Hat Linux 6.1 Rlogin /etc/nologin 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.
7.0	$0-$5k	0.00

Summaryinfo

A vulnerability labeled as critical has been found in Red Hat Linux 6.1. This impacts an unknown function of the file /etc/nologin of the component Rlogin. The manipulation results in improper authentication. This vulnerability is reported as CVE-1999-1346. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Red Hat Linux 6.1 (Operating System). It has been classified as critical. Affected is an unknown part of the file /etc/nologin of the component Rlogin. The manipulation with an unknown input leads to a improper authentication vulnerability. CWE is classifying the issue as CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

PAM configuration file for rlogin in Red Hat Linux 6.1 and earlier includes a less restrictive rule before a more restrictive one, which allows users to access the host via rlogin even if rlogin has been explicitly disabled using the /etc/nologin file.

The issue has been introduced in 10/04/1999. The weakness was disclosed 10/07/1999 as not defined posting (Bugtraq). The advisory is shared for download at marc.theaimsgroup.com. This vulnerability is traded as CVE-1999-1346. 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 known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 3 days. During that time the estimated underground price was around $5k-$25k.

Upgrading eliminates this vulnerability.

The entry VDB-14893 is pretty similar. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Operating System

Vendor

Red Hat

Name

Linux

Version

License

open-source

Website

Vendor: https://www.redhat.com/

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
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: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/04/1999 🔍
10/07/1999 +3 days 🔍
10/07/1999 +0 days 🔍
06/22/2014 +5372 days 🔍
04/19/2026 +4319 days 🔍

Sourcesinfo

Vendor: redhat.com

Advisory: marc.theaimsgroup.com
Status: Confirmed

CVE: CVE-1999-1346 (🔍)
GCVE (CVE): GCVE-0-1999-1346
GCVE (VulDB): GCVE-100-14892
See also: 🔍

Entryinfo

Created: 06/22/2014 13:42
Updated: 04/19/2026 14:21
Changes: 06/22/2014 13:42 (43), 04/14/2019 22:06 (10), 04/19/2026 14:21 (18)
Complete: 🔍
Cache ID: 216::103