OpenBSD 3.8/3.9 Semaphore Allocation denial of service

CVSS Meta Temp Score
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CTI Interest Score
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5.2$0-$5k0.00

A vulnerability, which was classified as problematic, has been found in OpenBSD 3.8/3.9 (Operating System). This issue affects an unknown part of the component Semaphore Allocation. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. The summary by CVE is:

OpenBSD 3.8, 3.9, and possibly earlier versions allows context-dependent attackers to cause a denial of service (kernel panic) by allocating more semaphores than the default.

The weakness was published 08/28/2006 with OpenBSD Team (Website). It is possible to read the advisory at openbsd.org. The identification of this vulnerability is CVE-2006-4435 since 08/28/2006. The attack needs to be done within the local network. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at ftp.openbsd.org.

The vulnerability is also documented in the vulnerability database at X-Force (28617). Similar entries are available at 2496 and 2497.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 5.2

VulDB Base Score: 6.5
VulDB Temp Score: 5.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Partially

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: ftp.openbsd.org

Timelineinfo

08/25/2006 🔍
08/25/2006 +0 days 🔍
08/28/2006 +3 days 🔍
08/28/2006 +0 days 🔍
08/28/2006 +0 days 🔍
08/28/2006 +0 days 🔍
08/28/2006 +0 days 🔍
08/29/2006 +0 days 🔍
04/22/2018 +4254 days 🔍

Sourcesinfo

Advisory: openbsd.org
Researcher: http://www.openbsd.org
Organization: OpenBSD Team
Status: Not defined

CVE: CVE-2006-4435 (🔍)
X-Force: 28617 - OpenBSD semaphores denial of service, Medium Risk
SecurityTracker: 1016756
SecurityFocus: 19713 - OpenBSD Semaphore Allocation Denial Of Service Vulnerability
Secunia: 21642 - OpenBSD sempahores Denial of Service Vulnerability, Not Critical
OSVDB: 28195 - OpenBSD sempahores Manipulation Kernel Panic Local DoS

See also: 🔍

Entryinfo

Created: 08/29/2006 16:37
Updated: 04/22/2018 12:57
Changes: 08/29/2006 16:37 (70), 04/22/2018 12:57 (7)
Complete: 🔍

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