The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230).
Attack Complexity
Low
AC
The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Privileges Required
None
PR
The attacker is unauthenticated prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
User Interaction
None
UI
The vulnerable system can be exploited without interaction from any human user, other than the attacker. Examples include: a remote attacker is able to send packets to a target system a locally authenticated attacker executes code to elevate privileges
Scope
Unchanged
S
An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances.
Confidentiality
High
C
There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data.
Integrity
High
I
There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system.
Availability
High
A
There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.
Below is a copy: VisualWare MyConnection Server 11.x Remote Code Execution
Document Title:
===============
VisualWare MyConnection Server 11.x Remote Code Execution Vulnerability
References (Source):
====================
https://www.securifera.com/advisories/cve-2021-27198/
https://myconnectionserver.visualware.com/download.html
Release Date:
=============
2020-02-25
Product & Service Introduction:
===============================
MCS tests, measures & reports the performance and health of any network
connection, LAN or WAN. MCS is an access everywhere web based enterprise
solution.
Vulnerability Information:
==============================
Class: CWE-434: Unrestricted Upload of File with Dangerous Type
Impact: Remote Code Execution
Remotely Exploitable: Yes
Locally Exploitable: Yes
CVE Name: CVE-2021-27198
Vulnerability Description:
==============================
An unauthenticated remote code execution vulnerability was discovered in
Visualware MyConnection Server 11.0 through 11.0b build 5382. The web
endpoint at "https://example.com/myspeed/sf" provides an unauthenticated
user the ability to upload an arbitrary file to an arbitrary location via a
specially crafted POST request. This application is written in Java and is
thus cross-platform. The Windows installation executes the web server as
SYSTEM which means that exploitation provides Administrator privileges on
the target system.
Vulnerability Disclosure Timeline:
==================================
2021-01-11: Contacted VisualWare About Issue via Website Contact Form
2021-02-03: Emailed Multiple VisualWare POCs Requesting Disclosure
Assistance
2021-02-11: Requested CVE from MITRE for vulnerability
2021-02-12: Messaged Lead VisualWare Developer on LinkedIn After Seeing They
Had Looked At My Profile. I assume because of my attempts to contact them
2021-02-18: Notified VisualWare About Issue Again via Website Contact Form
And Notified Them I Would be Disclosing if they did not respond
2021-02-25: Publicly releasing vulnerability because company refuses to
respond to any attempts to coordinate disclsoure
Affected Product(s):
====================
VisualWare MyConnection Server 11.0 through 11.0b build 5382
Severity Level:
===============
High
Proof of Concept (PoC):
=======================
A proof of concept will not be provided at this time.
Solution - Fix & Patch:
=======================
None
Security Risk:
==============
The security risk of this remote code execution vulnerability is estimated
as high. (CVSS 10.0)
Credits & Authors:
==================
Securifera, Inc - b0yd (@rwincey)
Disclaimer & Information:
=========================
The information provided in this advisory is provided as it is without any
warranty. Securifera disclaims all
warranties, either expressed or implied,
including the warranties of merchantability and capability for a particular
purpose. Securifera is not liable in any
case of damage,
including direct, indirect, incidental, consequential loss of business
profits or special damages, even if Securifera
or its suppliers have been advised
of the possibility of such damages. Some states do not allow the exclusion
or limitation of liability for consequential
or incidental damages so the foregoing
limitation may not apply. We do not approve or encourage anybody to break
any licenses, policies, or hack into any
systems.
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Contact: contact [at] securifera [dot] com
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