CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
5.3 | $0-$5k | 0.00 |
A vulnerability has been found in Xen 4.6.x/4.7.x/4.8.x (Virtualization Software) and classified as critical. This vulnerability affects an unknown code of the component VMFUNC Emulation. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. CVE summarizes:
VMFUNC emulation in Xen 4.6.x through 4.8.x on x86 systems using AMD virtualization extensions (aka SVM) allows local HVM guest OS users to cause a denial of service (hypervisor crash) by leveraging a missing NULL pointer check.
The bug was discovered 12/21/2016. The weakness was published 12/21/2016 by Jan Beulich with SuSE as XSA-203 as confirmed security advisory (Website). The advisory is available at xenbits.xen.org. The public release has been coordinated with the vendor. This vulnerability was named CVE-2016-10025 since 12/21/2016. The exploitation appears to be easy. Local access is required to approach this attack. A single authentication is needed for exploitation. The technical details are unknown and an exploit is not available.
The vulnerability scanner Nessus provides a plugin with the ID 96778 (Citrix XenServer Multiple Vulnerabilities (CTX219378)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Misc. and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 169447 (SUSE Enterprise Linux Security Update for xen (SUSE-SU-2016:3208-1)).
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 vulnerability database at Tenable (96778). Similar entry is available at 94629.
Product
Type
Name
Version
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 5.5VulDB Meta Temp Score: 5.4
VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 5.5
NVD Vector: 🔍
CVSSv2
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VulDB Base Score: 🔍
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Exploiting
Class: Null pointer dereferenceCWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍
Local: Yes
Remote: No
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
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Nessus ID: 96778
Nessus Name: Citrix XenServer Multiple Vulnerabilities (CTX219378)
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 Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: PatchStatus: 🔍
Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Timeline
12/21/2016 🔍12/21/2016 🔍
12/21/2016 🔍
12/21/2016 🔍
12/21/2016 🔍
12/21/2016 🔍
12/22/2016 🔍
01/25/2017 🔍
01/26/2017 🔍
07/14/2019 🔍
Sources
Advisory: XSA-203Researcher: Jan Beulich
Organization: SuSE
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍
CVE: CVE-2016-10025 (🔍)
SecurityTracker: 1037518
SecurityFocus: 95026 - Xen CVE-2016-10025 Denial of Service Vulnerability
See also: 🔍
Entry
Created: 12/22/2016 11:16Updated: 07/14/2019 17:52
Changes: 12/22/2016 11:16 (81), 07/14/2019 17:52 (6)
Complete: 🔍
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