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.
3.8	$0-$5k	0.00

A vulnerability was found in Linux Foundation Xen 4.1/4.2/4.3/4.4 on x86 (Virtualization Software). It has been rated as problematic. This issue affects an unknown code block. The manipulation of the argument MMU_MACHPHYS_UPDATE 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 weakness was published 11/20/2014 by Andrew Cooper with Citrix as XSA-113 as confirmed advisory (Website). It is possible to read the advisory at xenbits.xen.org. The advisory contains:

A draft of this advisory was mistakenly sent to xen-devel. The Xen Project Security Team apologises for this error. We are working to share best working practices amongst the team to reduce the risks of recurrance.

The identification of this vulnerability is CVE-2014-9030. The exploitation is known to be easy. The attack may be initiated remotely. The requirement for exploitation is a simple authentication. Technical details of the vulnerability are known, but there is no available exploit. The advisory points out:

An error handling path in the processing of MMU_MACHPHYS_UPDATE failed to drop a page reference which was acquired in an earlier processing step.

The commercial vulnerability scanner Qualys is able to test this issue with plugin 123470 (Fedora Security Update for xen (FEDORA-2015-3721)).

Applying the patch xsa113.patch is able to eliminate this problem. The bugfix is ready for download at xenbits.xen.org. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at X-Force (98853). Similar entries are available at 67683, 68221, 68298 and 71769.

Productinfo

Type

• Virtualization Software

Vendor

• Linux Foundation

Name

• Xen

Version

• 4.1
• 4.2
• 4.3
• 4.4

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: 4.3
VulDB Meta Temp Score: 3.8

VulDB Base Score: 4.3
VulDB Temp Score: 3.8
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
ATT&CK: T1499

Local: No
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

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: xsa113.patch

Timelineinfo

11/20/2014 🔍
11/20/2014 +0 days 🔍
11/20/2014 +0 days 🔍
11/20/2014 +0 days 🔍
11/21/2014 +1 days 🔍
02/25/2022 +2653 days 🔍

Sourcesinfo

Vendor: linuxfoundation.org

Advisory: XSA-113
Researcher: Andrew Cooper
Organization: Citrix
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-9030 (🔍)
X-Force: 98853 - Xen MMU_MACHPHYS_UPDATE denial of service, Medium Risk
SecurityFocus: 71207 - Xen MMU_MACHPHYS_UPDATE Handling Memory Leak Denial of Service Vulnerability
Secunia: 62672

See also: 🔍

Entryinfo

Created: 11/21/2014 09:30
Updated: 02/25/2022 07:43
Changes: 11/21/2014 09:30 (59), 03/08/2019 21:57 (1), 02/25/2022 07:37 (5), 02/25/2022 07:43 (7)
Complete: 🔍

Discussion

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