VDB-16753 · CVE-2001-1047 · XFDB 6661

OpenBSD 2.6/2.7/2.8/2.9 VFS race condition

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.
2.7	$0-$5k	0.00

Summaryinfo

A vulnerability identified as problematic has been detected in OpenBSD 2.6/2.7/2.8/2.9. Affected by this vulnerability is an unknown functionality of the component VFS. This manipulation causes race condition. This vulnerability appears as CVE-2001-1047. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability has been found in OpenBSD 2.6/2.7/2.8/2.9 (Operating System) and classified as problematic. Affected by this vulnerability is some unknown functionality of the component VFS. The manipulation with an unknown input leads to a race condition vulnerability. The CWE definition for the vulnerability is CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. As an impact it is known to affect availability. The summary by CVE is:

Race condition in OpenBSD VFS allows local users to cause a denial of service (kernel panic) by (1) creating a pipe in one thread and causing another thread to set one of the file descriptors to NULL via a close, or (2) calling dup2 on a file descriptor in one process, then setting the descriptor to NULL via a close in another process that is created via rfork.

The weakness was presented 06/02/2001 by Alexander Viro (Website). The advisory is shared at seclists.org. This vulnerability is known as CVE-2001-1047. The exploitation appears to be difficult. An attack has to be approached locally. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (6661) and SecurityFocus (BID 2818†). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Operating System

Name

OpenBSD

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 2.9
VulDB Meta Temp Score: 2.7

VulDB Base Score: 2.9
VulDB Temp Score: 2.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Race condition
CWE: CWE-362
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

06/02/2001 🔍
06/02/2001 +0 days 🔍
06/02/2001 +0 days 🔍
07/04/2014 +4780 days 🔍
07/04/2014 +0 days 🔍

Sourcesinfo

Advisory: seclists.org
Researcher: Alexander Viro
Status: Not defined

CVE: CVE-2001-1047 (🔍)
GCVE (CVE): GCVE-0-2001-1047
GCVE (VulDB): GCVE-100-16753
X-Force: 6661 - OpenBSD pipe() race condition denial of service
SecurityFocus: 2818 - OpenBSD Pipe VFS Race Condition Denial Of Service Vulnerability

Entryinfo

Created: 07/04/2014 12:45
Changes: 07/04/2014 12:45 (55)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.