OpenBSD 3.8/3.9 Semaphore Allocation denial of service

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.
5.2$0-$5k0.00

Summaryinfo

A vulnerability has been found in OpenBSD 3.8/3.9 and classified as problematic. This impacts an unknown function of the component Semaphore Allocation. The manipulation leads to denial of service. This vulnerability is referenced as CVE-2006-4435. No exploit is available. It is recommended to apply a patch to fix this issue.

Detailsinfo

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 databases at X-Force (28617), SecurityFocus (BID 19713†), OSVDB (28195†), Secunia (SA21642†) and SecurityTracker (ID 1016756†). Similar entries are available at VDB-2496 and VDB-2497. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

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

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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

NVD Base Score: 🔍

Exploitinginfo

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

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Threat Intelligenceinfo

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

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 (🔍)
GCVE (CVE): GCVE-0-2006-4435
GCVE (VulDB): GCVE-100-2495
X-Force: 28617 - OpenBSD semaphores denial of service, Medium Risk
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
SecurityTracker: 1016756

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: 🔍
Cache ID: 216:CCC:103

Be aware that VulDB is the high quality source for vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you know our Splunk app?

Download it now for free!