CVE-2021-39271 Explained : Impact and Mitigation

OrbiTeam BSCW Classic before 7.4.3 allows authenticated remote code execution (RCE) during archive extraction via attacker-supplied Python code in the class attribute of a .bscw file. This is fixed in versions 5.0.12, 5.1.10, 5.2.4, 7.3.3, and 7.4.3.

Understanding CVE-2021-39271

OrbiTeam BSCW Classic before 7.4.3 is vulnerable to authenticated remote code execution during archive extraction via an attacker-supplied Python code in the class attribute of a .bscw file.

What is CVE-2021-39271?

Type: Remote Code Execution (RCE)
CVE ID: CVE-2021-39271

The Impact of CVE-2021-39271

The vulnerability allows attackers to execute arbitrary Python code during archive extraction in an authenticated context, potentially leading to full system compromise.

Technical Details of CVE-2021-39271

OrbiTeam BSCW Classic before 7.4.3 is vulnerable to remote code execution due to

Vulnerability Description

Attack Vector: Remote
Attack Complexity: Low
Privileges Required: Low
User Interaction: Required

Affected Systems and Versions

The following versions are affected:

All versions before 7.4.3

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting Python code in the class attribute of a .bscw file during archive extraction.

Mitigation and Prevention

It is crucial to take immediate action to mitigate the risks posed by CVE-2021-39271.

Immediate Steps to Take

Update OrbiTeam BSCW Classic to version 7.4.3 or later.
Avoid opening untrusted .bscw files.
Implement strong authentication mechanisms.

Long-Term Security Practices

Regularly update software and apply security patches.
Conduct security training to educate users on identifying and avoiding malicious files.

Patching and Updates

OrbiTeam has released fixes in versions 5.0.12, 5.1.10, 5.2.4, 7.3.3, and 7.4.3. Ensure you apply the latest available patches to secure your systems.