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.
3.5	$0-$5k	0.00

Summaryinfo

A vulnerability classified as problematic has been found in Linux Foundation Xen on x86. Affected is the function do_mmu_update of the component MMU Virtualization. This manipulation causes input validation. This vulnerability is handled as CVE-2014-8594. There is not any exploit available. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability classified as problematic was found in Linux Foundation Xen on x86 (Virtualization Software). Affected by this vulnerability is the function do_mmu_update of the component MMU Virtualization. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect integrity.

The weakness was released 11/18/2014 by Jan Beulich with Citrix as XSA-109 as confirmed advisory (Website). The advisory is shared at xenbits.xen.org. This vulnerability is known as CVE-2014-8594 since 11/04/2014. The exploitation appears to be easy. An attack has to be approached locally. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available. The advisory points out:

MMU update operations targeting page tables are intended to be used on PV guests only. The lack of a respective check made it possible for such operations to access certain function pointers which remain NULL when the target guest is using Hardware Assisted Paging (HAP).

The vulnerability scanner Nessus provides a plugin with the ID 81027 (Debian DSA-3140-1 : xen - security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 123470 (Fedora Security Update for xen (FEDORA-2015-3721)).

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability. The advisory contains the following remark:

Running only PV guests or HVM guests with shadow paging enabled will avoid this issue. In a radically disaggregated system, restricting HVM service domains to software images approved by the host administrator will avoid the vulnerability.

The vulnerability is also documented in the databases at X-Force (98767), Tenable (81027), SecurityFocus (BID 71149†), Secunia (SA62672†) and SecurityTracker (ID 1031270†). Entries connected to this vulnerability are available at VDB-67683, VDB-68222, VDB-68255 and VDB-68298. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Virtualization Software

Vendor

• Linux Foundation

Name

• Xen

Version

• 4.0.0
• 4.0.1
• 4.0.2
• 4.0.3
• 4.0.4
• 4.1.0
• 4.1.1
• 4.1.2
• 4.1.3
• 4.1.4
• 4.1.5
• 4.1.6.1
• 4.2.0
• 4.2.1
• 4.2.2
• 4.2.3
• 4.3.0
• 4.3.1

License

• open-source

Website

• Vendor: https://www.linuxfoundation.org/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.0
VulDB Meta Temp Score: 3.5

VulDB Base Score: 4.0
VulDB Temp Score: 3.5
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: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 81027
Nessus Name: Debian DSA-3140-1 : xen - security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 801150
OpenVAS Name: Fedora Update for xen FEDORA-2014-15503
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Timelineinfo

11/04/2014 🔍
11/18/2014 +14 days 🔍
11/18/2014 +0 days 🔍
11/18/2014 +0 days 🔍
11/19/2014 +1 days 🔍
11/19/2014 +0 days 🔍
11/19/2014 +0 days 🔍
11/20/2014 +1 days 🔍
11/28/2014 +8 days 🔍
01/28/2015 +61 days 🔍
01/28/2015 +0 days 🔍
02/25/2022 +2584 days 🔍

Sourcesinfo

Vendor: linuxfoundation.org

Advisory: XSA-109
Researcher: Jan Beulich
Organization: Citrix
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-8594 (🔍)
GCVE (CVE): GCVE-0-2014-8594
GCVE (VulDB): GCVE-100-68221

OVAL: 🔍

X-Force: 98767 - Xen MMU security bypass, Low Risk
SecurityFocus: 71149 - Xen MMU CVE-2014-8594 Local Security Bypass Vulnerability
Secunia: 62672 - Debian update for xen, Not Critical
SecurityTracker: 1031270
Vulnerability Center: 47193 - Xen 4.x through 4.4.x Remote DoS by Leveraging Hardware Emulation Services, Medium

See also: 🔍

Entryinfo

Created: 11/19/2014 10:42
Updated: 02/25/2022 00:00
Changes: 11/19/2014 10:42 (81), 06/26/2018 08:44 (14), 02/25/2022 00:00 (3)
Complete: 🔍
Cache ID: 216:8D8:103

Discussion

Might our Artificial Intelligence support you?

Check our Alexa App!