Xen SYSCALL Singlestep Exception access control

CVSS Meta Temp Score
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CTI Interest Score
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6.9$0-$5k0.00

Summaryinfo

A vulnerability has been found in Xen and classified as critical. This issue affects some unknown processing of the component SYSCALL Singlestep Exception Handler. This manipulation causes access control. This vulnerability is registered as CVE-2016-10013. Remote exploitation of the attack is possible. No exploit is available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability was found in Xen (Virtualization Software) (the affected version unknown). It has been declared as critical. Affected by this vulnerability is an unknown part of the component SYSCALL Singlestep Exception Handler. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Xen through 4.8.x allows local 64-bit x86 HVM guest OS users to gain privileges by leveraging mishandling of SYSCALL singlestep during emulation.

The bug was discovered 12/19/2016. The weakness was published 12/19/2016 as XSA-204 as confirmed security advisory (Website). It is possible to read the advisory at xenbits.xen.org. This vulnerability is known as CVE-2016-10013 since 12/19/2016. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. 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 96522 (OracleVM 3.2 : xen (OVMSA-2017-0009)), 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 276311 (Fedora Security Update for xen (FEDORA-2016-92e3ea2d1b)).

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 (96522), SecurityFocus (BID 94963†) and SecurityTracker (ID 1037491†). Similar entry is available at VDB-94629. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 6.9

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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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: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 96522
Nessus Name: OracleVM 3.2 : xen (OVMSA-2017-0009)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 870220
OpenVAS Name: Fedora Update for xen FEDORA-2016-92e3ea2d1b
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

12/19/2016 🔍
12/19/2016 +0 days 🔍
12/19/2016 +0 days 🔍
12/19/2016 +0 days 🔍
12/19/2016 +0 days 🔍
12/19/2016 +0 days 🔍
12/20/2016 +1 days 🔍
01/16/2017 +27 days 🔍
01/26/2017 +10 days 🔍
05/14/2026 +3395 days 🔍

Sourcesinfo

Advisory: XSA-204
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-10013 (🔍)
GCVE (CVE): GCVE-0-2016-10013
GCVE (VulDB): GCVE-100-94615

OVAL: 🔍

SecurityFocus: 94963 - Xen CVE-2016-10013 Privilege Escalation Vulnerability
SecurityTracker: 1037491

See also: 🔍

Entryinfo

Created: 12/20/2016 16:27
Updated: 05/14/2026 22:27
Changes: 12/20/2016 16:27 (76), 07/12/2019 18:09 (7), 05/14/2026 22:27 (17)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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