VDB-14540 · CVE-1999-0426 · EDB 19458

Linux Kernel 2.0.36 /dev/kmem authentication spoofing

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.
9.3	$0-$5k	0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Linux Kernel 2.0.36. This impacts an unknown function of the file /dev/kmem. Such manipulation leads to authentication spoofing. This vulnerability is referenced as CVE-1999-0426. Furthermore, an exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel 2.0.36 (Operating System) and classified as critical. Affected by this issue is an unknown functionality of the file /dev/kmem. The manipulation with an unknown input leads to a authentication spoofing vulnerability. Using CWE to declare the problem leads to CWE-290. This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The default permissions of /dev/kmem in Linux versions before 2.0.36 allows IP spoofing.

The weakness was published 03/01/1999. This vulnerability is handled as CVE-1999-0426. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details as well as a public exploit are known.

The exploit is available at exploit-db.com. It is declared as proof-of-concept.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Exploit-DB (19458). Similar entries are available at VDB-14542 and VDB-14538. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Operating System

Vendor

Linux

Name

Kernel

Version

2.0.36

License

open-source

Website

Vendor: https://www.kernel.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.3

VulDB Base Score: 9.8
VulDB Temp Score: 8.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

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: Authentication spoofing
CWE: CWE-290 / CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/01/1999 🔍
03/01/1999 +0 days 🔍
06/20/2014 +5590 days 🔍
04/18/2026 +4320 days 🔍

Sourcesinfo

Vendor: kernel.org

Status: Confirmed

CVE: CVE-1999-0426 (🔍)
GCVE (CVE): GCVE-0-1999-0426
GCVE (VulDB): GCVE-100-14540
scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 06/20/2014 17:22
Updated: 04/18/2026 17:39
Changes: 06/20/2014 17:22 (36), 04/04/2019 11:26 (10), 11/23/2024 07:03 (27), 04/18/2026 17:39 (10)
Complete: 🔍
Cache ID: 216::103