CVE-2021-42124 : Exploit Details and Defense Strategies

An improper access control vulnerability exists in Ivanti Avalanche before 6.3.3, allowing attackers to perform session takeovers.

Understanding CVE-2021-42124

The vulnerability lies in Ivanti Avalanche's improper access control, potentially enabling unauthorized access to the Inforail Service.

What is CVE-2021-42124?

Vulnerability in Ivanti Avalanche pre-6.3.3
Allows attackers with Inforail Service access to execute session takeovers

The Impact of CVE-2021-42124

This vulnerability could lead to unauthorized access and compromise sensitive information within affected systems.

Technical Details of CVE-2021-42124

The technical aspects of the vulnerability in Ivanti Avalanche before version 6.3.3.

Vulnerability Description

Improper access control vulnerability in Ivanti Avalanche
Risk: Session takeover by attackers

Affected Systems and Versions

Product: Ivanti Avalanche
Version: 6.3.3

Exploitation Mechanism

Attackers gaining access to the Inforail Service can exploit the vulnerability to take over user sessions.

Mitigation and Prevention

Steps to mitigate and prevent the CVE-2021-42124 vulnerability.

Immediate Steps to Take

Update Ivanti Avalanche to version 6.3.3 to eliminate the vulnerability
Review and restrict access permissions within Inforail Service

Long-Term Security Practices

Implement the principle of least privilege for user access
Regularly audit and monitor access controls for potential vulnerabilities

Patching and Updates

Stay informed of security patches and updates for Ivanti Avalanche
Apply security updates promptly to prevent exploitation of known vulnerabilities