CVE-2021-34591 Explained : Impact and Mitigation
Get insights into CVE-2021-34591, a local privilege escalation vulnerability in Bender/ebee Charge Controllers. Learn about its impact, affected systems, and mitigation steps.
Bender/ebee Charge Controllers in multiple versions are vulnerable to a local privilege escalation issue, potentially allowing authenticated attackers to gain root access via specific applications. Here's what you need to know about CVE-2021-34591.
Understanding CVE-2021-34591
This section provides insights into the vulnerability discovered in the Bender Charge Controller.
What is CVE-2021-34591?
CVE-2021-34591 refers to a local privilege escalation vulnerability in Bender/ebee Charge Controllers. By exploiting this vulnerability, an authenticated attacker can achieve root access through certain suid applications.
The Impact of CVE-2021-34591
The vulnerability has a CVSS base score of 7.8, categorizing it as high severity. It can lead to high confidentiality, integrity, and availability impacts. The attack complexity is low, with low privileges required.
Technical Details of CVE-2021-34591
This section delves into the specifics of the CVE, including the vulnerability description, affected systems and versions, and the exploitation mechanism.
Vulnerability Description
The vulnerability allows authenticated attackers to escalate their privileges locally by exploiting suid applications like socat, ip udhcpc, and ifplugd.
Affected Systems and Versions
Bender/ebee Charge Controllers versions 5.11.x, 5.12.x, 5.13.x, and 5.20.x are affected by this vulnerability.
Exploitation Mechanism
To exploit this vulnerability, an attacker needs to be authenticated and can leverage the mentioned suid applications to gain root access.
Mitigation and Prevention
This section outlines the steps to mitigate the impact of CVE-2021-34591.
Immediate Steps to Take
Users are advised to apply security patches promptly, restrict user privileges, and monitor system activities for any suspicious behavior.
Long-Term Security Practices
Implementing the principle of least privilege, conducting regular security audits, and keeping systems up to date with security patches are essential for long-term security.
Patching and Updates
Ensure that Bender/ebee Charge Controllers are updated to versions beyond the vulnerable ones to prevent exploitation of this vulnerability.