VDB-28092 · CVE-2005-4783 · OSVDB 20729

NetBSD 1.6/2.0/2.0.3/2.1 kernfs_vnops.c information disclosure

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.
3.8	$0-$5k	0.00

A vulnerability, which was classified as problematic, was found in NetBSD 1.6/2.0/2.0.3/2.1 (Operating System). Affected is an unknown functionality of the file kernfs_vnops.c. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. CVE summarizes:

kernfs_xread in kernfs_vnops.c in NetBSD before 20050831 does not check for a negative offset when reading the message buffer, which allows local users to read arbitrary kernel memory.

The weakness was disclosed 12/31/2005 (Website). The advisory is shared for download at mail-index.netbsd.org. This vulnerability is traded as CVE-2005-4783 since 04/13/2006. The exploitability is told to be easy. The attack needs to be approached locally. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

Applying a patch is able to eliminate this problem.

The entries 28088 and 28009 are pretty similar.

Productinfo

Type

Operating System

Name

NetBSD

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.0
VulDB Meta Temp Score: 3.8

VulDB Base Score: 4.0
VulDB Temp Score: 3.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Local: Yes
Remote: No

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: Patch
Status: 🔍

0-Day Time: 🔍

Timelineinfo

11/01/2005 🔍
11/10/2005 +9 days 🔍
12/31/2005 +50 days 🔍
12/31/2005 +0 days 🔍
04/13/2006 +103 days 🔍
03/12/2015 +3255 days 🔍
07/16/2018 +1222 days 🔍

Sourcesinfo

Advisory: mail-index.netbsd.org
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2005-4783 (🔍)
SecurityTracker: 1015132
OSVDB: 20729 - NetBSD Message Buffer Negative Offset Arbitrary Kernel Memory Access

See also: 🔍

Entryinfo

Created: 03/12/2015 11:11
Updated: 07/16/2018 09:23
Changes: 03/12/2015 11:11 (48), 07/16/2018 09:23 (7)
Complete: 🔍