CVE Vulnerabilities

CVE-2021-37364

Incorrect Permission Assignment for Critical Resource

Published: Oct 26, 2021 | Modified: Oct 28, 2021
CVSS 3.x
7.8
HIGH
Source:
NVD
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.x
9.3 HIGH
AV:N/AC:M/Au:N/C:C/I:C/A:C
RedHat/V2
RedHat/V3
Ubuntu

OpenClinic GA 5.194.18 is affected by Insecure Permissions. By default the Authenticated Users group has the modify permission to openclinic folders/files. A low privilege account is able to rename mysqld.exe or tomcat8.exe files located in bin folders and replace with a malicious file that would connect back to an attacking computer giving system level privileges (nt authoritysystem) due to the service running as Local System. While a low privilege user is unable to restart the service through the application, a restart of the computer triggers the execution of the malicious file. The application also have unquoted service path issues.

Weakness

The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors.

Affected Software

Name Vendor Start Version End Version
Openclinic_ga Openclinic_ga_project 5.194.18 (including) 5.194.18 (including)

Potential Mitigations

  • Run the code in a “jail” or similar sandbox environment that enforces strict boundaries between the process and the operating system. This may effectively restrict which files can be accessed in a particular directory or which commands can be executed by the software.
  • OS-level examples include the Unix chroot jail, AppArmor, and SELinux. In general, managed code may provide some protection. For example, java.io.FilePermission in the Java SecurityManager allows the software to specify restrictions on file operations.
  • This may not be a feasible solution, and it only limits the impact to the operating system; the rest of the application may still be subject to compromise.
  • Be careful to avoid CWE-243 and other weaknesses related to jails.

References