Linux Foundation Xen 4.2/4.3/4.4 x86_emulate.c 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 was found in Linux Foundation Xen 4.2/4.3/4.4. It has been declared as problematic. Affected is an unknown function of the file x86_emulate.c. Such manipulation leads to access control. This vulnerability is uniquely identified as CVE-2014-7155. No exploit exists. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Linux Foundation Xen 4.2/4.3/4.4 (Virtualization Software). Affected by this issue is some unknown processing of the file x86_emulate.c. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-264. Impacted is confidentiality, integrity, and availability.

The weakness was disclosed 09/23/2014 by Andrei Lutas with BitDefender as XSA-105 as confirmed advisory (Website). The advisory is available at xenbits.xen.org. This vulnerability is handled as CVE-2014-7155 since 09/24/2014. The exploitation is known to be easy. Local access is required to approach this attack. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 79542 (OracleVM 3.2 : xen (OVMSA-2014-0026)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family OracleVM Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 370032 (Citrix XenServer Security Update (CTX200218)).

Applying a 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 advisory contains the following remark:

Running only PV guests will avoid this issue. There is no mitigation available for HVM guests.

The vulnerability is also documented in the databases at X-Force (96148), Tenable (79542), SecurityFocus (BID 70057†), Secunia (SA61858†) and SecurityTracker (ID 1030888†). The entries VDB-67681, VDB-67719, VDB-71771 and VDB-71770 are pretty similar. If you want to get best quality of vulnerability data, you may have to visit 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

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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-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 79542
Nessus Name: OracleVM 3.2 : xen (OVMSA-2014-0026)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

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

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: xenbits.xen.org

Timelineinfo

09/23/2014 🔍
09/23/2014 +0 days 🔍
09/23/2014 +0 days 🔍
09/24/2014 +1 days 🔍
09/24/2014 +0 days 🔍
09/24/2014 +0 days 🔍
10/02/2014 +8 days 🔍
10/21/2014 +19 days 🔍
11/26/2014 +36 days 🔍
02/20/2022 +2643 days 🔍

Sourcesinfo

Vendor: linuxfoundation.org

Advisory: XSA-105
Researcher: Andrei Lutas
Organization: BitDefender
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-7155 (🔍)
GCVE (CVE): GCVE-0-2014-7155
GCVE (VulDB): GCVE-100-67682

OVAL: 🔍

X-Force: 96148 - Xen x86_emulate.c privilege escalation, Medium Risk
SecurityFocus: 70057 - Xen 'x86_emulate.c' Local Privilege Escalation Vulnerability
Secunia: 61858 - Citrix XenServer Multiple Vulnerabilities, Less Critical
SecurityTracker: 1030888

See also: 🔍

Entryinfo

Created: 09/24/2014 11:33
Updated: 02/20/2022 23:41
Changes: 09/24/2014 11:33 (71), 03/08/2019 20:45 (15), 02/20/2022 23:41 (3)
Complete: 🔍
Cache ID: 216:AF6:103

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