CVE-2020-13386 Information

Description

In SmartDraw 2020 27.0.0.0 the installer gives inherited write permissions to the Authenticated Users group on the SmartDraw 2020 installation folder. Additionally when the product is installed two scheduled tasks are created on the machine SDMsgUpdate (Local) and SDMsgUpdate (TE). The scheduled tasks run in the context of the user who installed the product. Both scheduled tasks attempt to run the same binary C:\SmartDraw 2020\Messages\SDNotify.exe. The folder Messages doesn’t exist by default and (by extension) neither does SDNotify.exe. Due to the weak folder permissions these can be created by any user. A malicious actor can therefore create a malicious SDNotify.exe binary and have it automatically run whenever the user who installed the product logs on to the machine. The malicious SDNotify.exe could for example create a new local administrator account on the machine.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

Reference

https://improsec.com/tech-blog/how-not-do-handle-responsible-disclosure-smartdraw-2020

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.3