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.
5.9	$0-$5k	0.00

A vulnerability was found in Linux Kernel (Operating System). It has been rated as problematic. This issue affects the function unmap_hugepage_area of the file hugetlb.c. 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:

The hugepage code (hugetlb.c) in Linux kernel 2.6, possibly 2.6.12 and 2.6.13, in certain configurations, allows local users to cause a denial of service (crash) by triggering an mmap error before a prefault, which causes an error in the unmap_hugepage_area function.

The issue has been introduced in 12/18/2003. The weakness was published 12/31/2005 as Bug 165345 as not defined bug report (Bugzilla). It is possible to read the advisory at bugzilla.redhat.com. The identification of this vulnerability is CVE-2005-4811 since 09/22/2006. The exploitation is known to be easy. Attacking locally is a requirement. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 744 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 22513 (CentOS 4 : kernel (CESA-2006:0689)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 156246 (Oracle Enterprise Linux Update for Kernel (ELSA-2006:0617, ELSA-2006:0689)).

Upgrading to version 2.6 eliminates this vulnerability. A possible mitigation has been published 10 months after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (22513). Similar entries are available at 2256, 2254, 2255 and 2257.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 2.6 Test9 Cvs
• 2.6.0
• 2.6.1
• 2.6.2
• 2.6.3
• 2.6.4
• 2.6.5
• 2.6.6
• 2.6.7
• 2.6.8
• 2.6.9
• 2.6.10
• 2.6.11
• 2.6.11.5
• 2.6.11.6
• 2.6.11.7
• 2.6.11.8
• 2.6.11.11
• 2.6.11.12
• 2.6.12
• 2.6.12.1
• 2.6.12.2
• 2.6.12.3
• 2.6.12.4
• 2.6.12.5
• 2.6.12.6
• 2.6.13
• 2.6.13.1
• 2.6.13.2
• 2.6.13.3
• 2.6.13.4

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: 6.2
VulDB Meta Temp Score: 5.9

VulDB Base Score: 6.2
VulDB Temp Score: 5.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

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: Denial of service
CWE: CWE-404
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

Nessus ID: 22513
Nessus Name: CentOS 4 : kernel (CESA-2006:0689)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 58357
OpenVAS Name: Debian Security Advisory DSA 1304-1 (kernel-source-2.6.8)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Kernel 2.6

Timelineinfo

12/18/2003 🔍
08/05/2005 +596 days 🔍
12/31/2005 +148 days 🔍
12/31/2005 +0 days 🔍
12/31/2005 +0 days 🔍
09/22/2006 +265 days 🔍
10/07/2006 +15 days 🔍
10/10/2006 +3 days 🔍
10/16/2006 +6 days 🔍
03/12/2015 +3069 days 🔍
07/09/2019 +1580 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: Bug 165345
Status: Not defined
Confirmation: 🔍

CVE: CVE-2005-4811 (🔍)
OVAL: 🔍

Vulnerability Center: 12905 - Linux Kernel Denial of Service Vulnerability in unmap_hugepage_area Function, Low
SecurityFocus: 20362 - Linux Kernel UnMap_HugePage_Area Local Denial of Service Vulnerability
Secunia: 22292
OSVDB: 29540 - CVE-2005-4811 - Linux - Denial of Service Issue

See also: 🔍

Entryinfo

Created: 03/12/2015 11:11
Updated: 07/09/2019 10:32
Changes: 03/12/2015 11:11 (81), 07/09/2019 10:32 (6)
Complete: 🔍

Discussion

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