Xen 4.4.x/4.5.x/4.6.x/4.7.x on 64-bit mode Register Operand Processor Host input validation

CVSS Meta Temp Score
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CTI Interest Score
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8.6$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Xen 4.4.x/4.5.x/4.6.x/4.7.x on 64-bit mode. Affected by this issue is some unknown functionality of the component Register Operand Processor. The manipulation leads to input validation (Host). This vulnerability is traded as CVE-2016-9383. An attack has to be approached locally. There is no exploit available. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Xen 4.4.x/4.5.x/4.6.x/4.7.x on 64-bit mode (Virtualization Software). This issue affects some unknown functionality of the component Register Operand Processor. The manipulation with an unknown input leads to a input validation vulnerability (Host). Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability.

The bug was discovered 11/22/2016. The weakness was shared 11/22/2016 by George Dunlap with Citrix as XSA-195 as confirmed security advisory (Website). The advisory is shared at xenbits.xen.org. The vendor cooperated in the coordination of the public release. The identification of this vulnerability is CVE-2016-9383 since 11/17/2016. The exploitation is known to be easy. An attack has to be approached locally. A simple authentication is required for exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 900047 , which helps to determine the existence of the flaw in a target environment. The commercial vulnerability scanner Qualys is able to test this issue with plugin 276244 (Fedora Security Update for xen (FEDORA-2016-999e1a6927)).

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 Tenable (900047), SecurityFocus (BID 94474†) and SecurityTracker (ID 1037346†). The entries VDB-92454, VDB-92455, VDB-92462 and VDB-93307 are related to this item. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.6

VulDB Base Score: 8.8
VulDB Temp Score: 8.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
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VulDB Reliability: 🔍

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Exploitinginfo

Name: Host
Class: Input validation / Host
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 900047
Nessus File: 🔍

OpenVAS ID: 703729
OpenVAS Name: Debian Security Advisory DSA 3729-1 (xen - 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

11/17/2016 🔍
11/22/2016 +5 days 🔍
11/22/2016 +0 days 🔍
11/22/2016 +0 days 🔍
11/22/2016 +0 days 🔍
11/25/2016 +3 days 🔍
11/25/2016 +0 days 🔍
01/23/2017 +59 days 🔍
05/14/2026 +3398 days 🔍

Sourcesinfo

Advisory: XSA-195
Researcher: George Dunlap
Organization: Citrix
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2016-9383 (🔍)
GCVE (CVE): GCVE-0-2016-9383
GCVE (VulDB): GCVE-100-93809

OVAL: 🔍

SecurityFocus: 94474 - Xen CVE-2016-9383 Memory Corruption Vulnerability
SecurityTracker: 1037346

See also: 🔍

Entryinfo

Created: 11/25/2016 11:52
Updated: 05/14/2026 16:49
Changes: 11/25/2016 11:52 (69), 06/10/2019 06:46 (14), 10/04/2022 14:14 (3), 05/14/2026 16:49 (15)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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