CVE-2021-43269 : Exploit Details and Defense Strategies

Code42 app before version 8.8.0 is susceptible to eval injection, enabling malevolent modification of a device's proxy configuration to utilize a malicious proxy auto-config file, leading to arbitrary code execution.

Understanding CVE-2021-43269

In Code42 app versions before 8.8.0, a security vulnerability exists that allows an attacker to exploit eval injection to manipulate a device's proxy settings, potentially resulting in the execution of arbitrary code.

What is CVE-2021-43269?

This CVE pertains to a vulnerability in pre-8.8.0 versions of the Code42 app, which permits an attacker to alter a device's proxy configuration to utilize a malicious proxy auto-config (PAC) file, thereby facilitating arbitrary code execution. The impacted products include Incydr Basic, Advanced, and Gov F1, as well as CrashPlan Cloud and CrashPlan for Small Business.

The Impact of CVE-2021-43269

The exploitation of this vulnerability can lead to arbitrary code execution on affected devices, potentially allowing attackers to achieve unauthorized access, steal sensitive information, or disrupt systems.

Technical Details of CVE-2021-43269

In depth technical aspects and implications of the vulnerability.

Vulnerability Description

The vulnerability in Code42 app versions prior to 8.8.0 enables eval injection manipulation, empowering attackers to modify device proxy configurations to utilize a malicious PAC file for executing arbitrary code.

Affected Systems and Versions

Incydr Basic, Advanced, Gov F1
CrashPlan Cloud
CrashPlan for Small Business

Exploitation Mechanism

Attackers can exploit the eval injection vulnerability to maliciously adjust a device's proxy settings, leading to the execution of unauthorized code on the affected systems.

Mitigation and Prevention

Effective strategies to address and prevent the vulnerability.

Immediate Steps to Take

Upgrade Code42 app to version 8.8.0 or above to mitigate the vulnerability.
Regularly monitor for abnormal network activities indicating proxy configuration changes.

Long-Term Security Practices

Implement network segmentation to limit the impact of potential breaches.
Conduct regular security training for employees to enhance awareness of social engineering attempts and phishing emails.

Patching and Updates

Ensure timely application of security patches and updates to all software and systems to address known vulnerabilities.