CVE-2021-43986 Explained : Impact and Mitigation
Learn about CVE-2021-43986, a security vulnerability in FANUC ROBOGUIDE Simulation Platform allowing unauthorized users to escalate privileges by replacing binaries. Find mitigation steps and new version details.
CVE-2021-43986, also known as ICSA-22-109-03, pertains to security vulnerabilities in the FANUC ROBOGUIDE Simulation Platform that were reported to CISA. The vulnerability allows unauthorized users to replace binaries and escalate privileges.
Understanding CVE-2021-43986
This CVE concerns improper access control in the ROBOGUIDE setup program, potentially leading to privilege escalation for unauthorized users.
What is CVE-2021-43986?
The affected product's setup program configures files and folders with full access, enabling unauthorized users to replace original binaries, resulting in potential privilege escalation.
The Impact of CVE-2021-43986
The vulnerability poses a medium severity threat with a CVSS base score of 6. It has a high impact on availability and integrity, requiring low privileges for exploitation.
Technical Details of CVE-2021-43986
This section covers specific technical aspects of the CVE.
Vulnerability Description
The vulnerability is categorized under CWE-284, describing the improper access control issue within the affected product's setup configuration.
Affected Systems and Versions
- Affected Product: ROBOGUIDE
- Vendor: FANUC
- Vulnerable Versions: All versions less than v9.40083.00.05 (Rev T)
Exploitation Mechanism
- Attack Complexity: High
- Attack Vector: Local
- Privileges Required: Low
- User Interaction: Required
- Scope: Unchanged
- Vector String: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:H
Mitigation and Prevention
Here are the measures to mitigate and prevent exploitation of this vulnerability.
Immediate Steps to Take
- Users should apply the new version, ROBOGUIDE v9 Rev U or higher, provided by FANUC to address the vulnerabilities.
Long-Term Security Practices
- Regularly review and update access control and permissions on critical files and directories.
- Implement the principle of least privilege to limit user access rights.
Patching and Updates
- Download the patched version of ROBOGUIDE v9 Rev U or higher from the official FANUC or FANUC America website.