XenSource Xen 3.4/4.0/4.1/4.2 PCI Config access control

CVSS Meta Temp Score
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CTI Interest Score
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5.2$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in XenSource Xen 3.4/4.0/4.1/4.2. This vulnerability affects unknown code of the component PCI Config Handler. The manipulation leads to access control. This vulnerability is listed as CVE-2015-4106. There is no available exploit. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in XenSource Xen 3.4/4.0/4.1/4.2 (Virtualization Software). This issue affects some unknown processing of the component PCI Config Handler. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Impacted is confidentiality, integrity, and availability.

The weakness was presented 06/02/2015 by Jan Beulich with SuSE as XSA-131 as confirmed security advisory (Website). It is possible to read the advisory at xenbits.xen.org. The identification of this vulnerability is CVE-2015-4106 since 05/27/2015. The exploitation is known to be easy. Attacking locally is a requirement. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 84167 (Debian DSA-3284-1 : qemu - 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. The commercial vulnerability scanner Qualys is able to test this issue with plugin 370035 (Citrix XenServer Security Update (CTX201145)).

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (103546), Tenable (84167), SecurityFocus (BID 74949†), SecurityTracker (ID 1032467†) and Vulnerability Center (SBV-50723†). See VDB-74497, VDB-75680, VDB-75681 and VDB-75682 for similar entries. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.9
VulDB Temp Score: 5.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 84167
Nessus Name: Debian DSA-3284-1 : qemu - security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 703284
OpenVAS Name: Debian Security Advisory DSA 3284-1 (qemu - security update)
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

05/07/2015 🔍
05/27/2015 +20 days 🔍
06/02/2015 +6 days 🔍
06/02/2015 +0 days 🔍
06/02/2015 +0 days 🔍
06/03/2015 +1 days 🔍
06/03/2015 +0 days 🔍
06/03/2015 +0 days 🔍
06/28/2015 +25 days 🔍
05/20/2022 +2518 days 🔍

Sourcesinfo

Vendor: citrix.com

Advisory: XSA-131
Researcher: Jan Beulich
Organization: SuSE
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-4106 (🔍)
GCVE (CVE): GCVE-0-2015-4106
GCVE (VulDB): GCVE-100-75683

OVAL: 🔍

X-Force: 103546 - Xen PCI config space privilege escalation
SecurityFocus: 74949 - Xen CVE-2015-4106 Local Security Bypass Vulnerability
SecurityTracker: 1032467 - Xen PCI Register Access Flaw Lets Local Users Obtain Potentially Sensitive Information, Gain Elevated Privileges, and Deny Service
Vulnerability Center: 50723 - QEMU Local Multiple Vulnerabilities due to Improper Restriction of Write Access to the PCI Config Space, Low

See also: 🔍

Entryinfo

Created: 06/03/2015 11:03
Updated: 05/20/2022 02:00
Changes: 06/03/2015 11:03 (77), 07/01/2017 08:15 (6), 05/20/2022 01:53 (3), 05/20/2022 02:00 (1)
Complete: 🔍
Cache ID: 216:AF6:103

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