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.
6.5	$0-$5k	0.00

A vulnerability classified as critical was found in Linux Foundation Xen (Virtualization Software). This vulnerability affects the function handle_gdt_ldt_mapping_fault. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability. CVE summarizes:

The fixup_page_fault function in arch/x86/traps.c in Xen 4.0.1 and earlier on 64-bit platforms, when paravirtualization is enabled, does not verify that kernel mode is used to call the handle_gdt_ldt_mapping_fault function, which allows guest OS users to cause a denial of service (host OS BUG_ON) via a crafted memory access.

The weakness was shared 01/24/2011 as Bug 658155 as not defined bug report (Bugzilla). The advisory is shared for download at bugzilla.redhat.com. This vulnerability was named CVE-2010-4255. The exploitation appears to be easy. The attack needs to approached within the local network. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 51522 (RHEL 5 : kernel (RHSA-2011:0017)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Red Hat Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 118912 (Red Hat Update for Kernel (RHSA-2011:0017)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (51522), SecurityFocus (BID 45099†) and Vulnerability Center (SBV-29187†). The entries VDB-56205, VDB-56094 and VDB-55859 are related to this item.

Productinfo

Type

• Virtualization Software

Vendor

• Linux Foundation

Name

• Xen

Version

• 3.0.2
• 3.0.3
• 3.0.4
• 3.1.2
• 3.1.3
• 3.1.4
• 3.2.0
• 3.2.1
• 3.2.2
• 3.2.3
• 3.3.0
• 3.3.1
• 3.3.2
• 3.4.0
• 3.4.1
• 3.4.2
• 3.4.3
• 4.0.0
• 4.0.1

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

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

VulDB Base Score: 6.5
VulDB Temp Score: 6.5
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: No
Remote: Partially

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: 51522
Nessus Name: RHEL 5 : kernel (RHSA-2011:0017)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 870378
OpenVAS Name: RedHat Update for Red Hat Enterprise Linux 5.6 kernel RHSA-2011:0017-01
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

11/16/2010 🔍
11/30/2010 +14 days 🔍
11/30/2010 +0 days 🔍
01/18/2011 +49 days 🔍
01/24/2011 +6 days 🔍
01/24/2011 +0 days 🔍
03/19/2015 +1515 days 🔍
10/13/2021 +2400 days 🔍

Sourcesinfo

Vendor: linuxfoundation.org

Advisory: Bug 658155
Status: Not defined
Confirmation: 🔍

CVE: CVE-2010-4255 (🔍)
OVAL: 🔍
IAVM: 🔍

SecurityFocus: 45099 - Xen 'fixup_page_fault()' Denial of Service Vulnerability
Secunia: 42884
Vulnerability Center: 29187 - Xen 3.0 through 4.0 Local DoS Vulnerability, Medium

See also: 🔍

Entryinfo

Created: 03/19/2015 11:27 PM
Updated: 10/13/2021 08:12 AM
Changes: 03/19/2015 11:27 PM (62), 03/13/2017 10:01 AM (11), 10/13/2021 08:09 AM (5), 10/13/2021 08:12 AM (1)
Complete: 🔍
Cache ID: 18:77D:40

Discussion

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