XenSource Xen I/O Port EFLAGS.IOPL access control

CVSS Meta Temp Score
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CTI Interest Score
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7.3$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in XenSource Xen. Affected by this vulnerability is an unknown functionality of the file EFLAGS.IOPL of the component I/O Port Handler. The manipulation results in access control. This vulnerability was named CVE-2016-3157. The attack needs to be approached locally. There is no available exploit. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability classified as critical has been found in XenSource Xen (Virtualization Software) (the affected version unknown). Affected is an unknown part of the file EFLAGS.IOPL of the component I/O Port Handler. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-264. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was presented 03/16/2016 by Andy Lutomirski as XSA-171 as confirmed security advisory (Website). The advisory is available at xenbits.xen.org. This vulnerability is traded as CVE-2016-3157 since 03/15/2016. The exploitability is told to be easy. Local access is required to approach this attack. A authentication is necessary 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 91085 (Ubuntu 16.04 LTS : linux-snapdragon vulnerability (USN-2965-4)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 196463 (Ubuntu Security Notification for Linux Vulnerabilities (USN-2965-1)).

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 (111520), Tenable (91085), SecurityFocus (BID 84594†) and Vulnerability Center (SBV-57366†). See VDB-81364, VDB-81365, VDB-81366 and VDB-81554 for similar entries. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.8
VulDB Temp Score: 6.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Access control
CWE: CWE-264
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: 91085
Nessus Name: Ubuntu 16.04 LTS : linux-snapdragon vulnerability (USN-2965-4)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 14611
OpenVAS Name: Amazon Linux Local Check: alas-2016-669
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

03/15/2016 🔍
03/16/2016 +1 days 🔍
03/16/2016 +0 days 🔍
03/17/2016 +1 days 🔍
03/17/2016 +0 days 🔍
03/17/2016 +0 days 🔍
04/12/2016 +25 days 🔍
05/12/2016 +30 days 🔍
07/10/2022 +2250 days 🔍

Sourcesinfo

Vendor: citrix.com

Advisory: XSA-171
Researcher: Andy Lutomirski
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-3157 (🔍)
GCVE (CVE): GCVE-0-2016-3157
GCVE (VulDB): GCVE-100-81378

OVAL: 🔍

X-Force: 111520 - Xen I/O port privilege escalation
SecurityFocus: 84594 - Linux Kernel Xen PV Guest CVE-2016-3157 Local Privilege Escalation Vulnerability
SecurityTracker: 1035308
Vulnerability Center: 57366 - Xen 4.4.* Local Multiple Vulnerabilities due to Issue in IRET and POPF, High

See also: 🔍

Entryinfo

Created: 03/17/2016 11:08
Updated: 07/10/2022 13:58
Changes: 03/17/2016 11:08 (77), 02/01/2019 14:38 (12), 07/10/2022 13:58 (4)
Complete: 🔍
Cache ID: 216:058:103

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