CVE Vulnerabilities

CVE-2018-18561

Incorrect Permission Assignment for Critical Resource

Published: Nov 20, 2018 | Modified: Aug 24, 2020
CVSS 3.x
8
HIGH
Source:
NVD
CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
7.7 HIGH
AV:A/AC:L/Au:S/C:C/I:C/A:C
RedHat/V2
RedHat/V3
Ubuntu

An issue was discovered in Roche Accu-Chek Inform II Base Unit / Base Unit Hub before 03.01.04 and CoaguChek / cobas h232 Handheld Base Unit before 03.01.04. Insecure permissions in a service interface may allow authenticated attackers in the adjacent network to execute arbitrary commands on the operating system.

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.

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