CVE-2021-33358 : Security Advisory and Response
Learn about CVE-2021-33358 where authenticated attackers can exploit vulnerabilities in RaspAP to execute arbitrary OS commands. Find out how to mitigate and prevent these risks.
Multiple vulnerabilities exist in RaspAP 2.3 to 2.6.5 in the "interface", "ssid" and "wpa_passphrase" POST parameters in /hostapd, enabling an attacker to execute arbitrary OS commands.
Understanding CVE-2021-33358
This CVE highlights the presence of multiple vulnerabilities in specific parameters of RaspAP version 2.3 to 2.6.5 that can be exploited by an authenticated attacker.
What is CVE-2021-33358?
The CVE-2021-33358 pertains to vulnerabilities in the "interface", "ssid" and "wpa_passphrase" POST parameters in /hostapd of RaspAP versions 2.3 to 2.6.5. These vulnerabilities allow an authenticated attacker to execute arbitrary OS commands when these parameters contain certain special characters.
The Impact of CVE-2021-33358
An attacker with authenticated access can exploit these vulnerabilities to execute arbitrary OS commands. This could lead to unauthorized access or manipulation of the system, posing a serious security risk.
Technical Details of CVE-2021-33358
This section will delve into the specific technical aspects of the vulnerability.
Vulnerability Description
The vulnerabilities arise when the "interface", "ssid", and "wpa_passphrase" POST parameters in /hostapd of RaspAP versions 2.3 to 2.6.5 contain special characters like ";" or "$()". This allows attackers to execute arbitrary OS commands.
Affected Systems and Versions
RaspAP versions 2.3 to 2.6.5 are affected by these vulnerabilities.
Exploitation Mechanism
Authenticated attackers can exploit these vulnerabilities by injecting specially crafted input containing characters like ";" or "$()" into the mentioned parameters, leading to the execution of unauthorized OS commands.
Mitigation and Prevention
To secure systems against CVE-2021-33358, immediate steps should be taken while implementing long-term security measures and applying necessary patches and updates.
Immediate Steps to Take
System administrators should restrict access to sensitive functionalities, sanitize input values, and monitor for any suspicious activities or commands.
Long-Term Security Practices
Implement secure coding practices, conduct regular security audits, and educate users to recognize and report unusual behaviors.
Patching and Updates
Users are advised to update RaspAP to the latest version available, which addresses these vulnerabilities and enhances overall system security.