Xen 4.4/4.5/4.6/4.7/4.8 Memory access control

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.

A vulnerability was found in Xen 4.4/4.5/4.6/4.7/4.8 (Virtualization Software). It has been rated as critical. This issue affects some unknown processing. The manipulation with an unknown input leads to a access control vulnerability (Memory). Using CWE to declare the problem leads to CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Impacted is confidentiality, integrity, and availability.

The bug was discovered 04/04/2017. The weakness was disclosed 04/04/2017 by Jann Horn with Google Project Zero (oss-sec). It is possible to read the advisory at openwall.com. The identification of this vulnerability is CVE-2017-7228 since 03/22/2017. The exploitation is known to be easy. Attacking locally is a requirement. No form of authentication is needed for a successful exploitation. Technical details are unknown but a public exploit is available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

The exploit is available at exploit-db.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 99377 (Citrix XenServer multiple vulnerabilities (CTX222565)), 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 276570 (Fedora Security Update for xen (FEDORA-2017-054729ab08)).

Applying a patch is able to eliminate this problem. A possible mitigation has been published 1 days after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (99377) and Exploit-DB (41870).






CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 6.9
VulDB Meta Temp Score: 6.6

VulDB Base Score: 5.7
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.2
NVD Vector: 🔍



VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍


Name: Memory
Class: Access control / Memory
CWE: CWE-284 / CWE-266
ATT&CK: T1068

Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Nessus ID: 99377
Nessus Name: Citrix XenServer multiple vulnerabilities (CTX222565)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703847
OpenVAS Name: Debian Security Advisory DSA 3847-1 (xen - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍


Recommended: Patch
Status: 🔍

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


03/22/2017 🔍
04/04/2017 +13 days 🔍
04/04/2017 +0 days 🔍
04/04/2017 +0 days 🔍
04/04/2017 +0 days 🔍
04/04/2017 +0 days 🔍
04/05/2017 +1 days 🔍
04/14/2017 +9 days 🔍
11/27/2022 +2053 days 🔍


Advisory: openwall.com
Researcher: Jann Horn
Organization: Google Project Zero
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-7228 (🔍)

SecurityTracker: 1038223
SecurityFocus: 97375 - Xen 'memory_exchange()' Function Incomplete Fix Privilege Escalation Vulnerability
OSVDB: - CVE-2017-7228 - Xen - Security Bypass Issue

scip Labs: https://www.scip.ch/en/?labs.20161013


Created: 04/04/2017 10:25 PM
Updated: 11/27/2022 07:39 AM
Changes: 04/04/2017 10:25 PM (75), 08/25/2020 04:41 PM (11), 11/27/2022 07:39 AM (4)
Complete: 🔍


No comments yet. Languages: en.

Please log in to comment.

Interested in the pricing of exploits?

See the underground prices here!