CVE-2021-34787 : Vulnerability Insights and Analysis

A vulnerability in the identity-based firewall (IDFW) rule processing feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software allows an unauthenticated remote attacker to bypass security protections by sending a specially crafted network request. This could lead to the attacker bypassing access control list (ACL) rules, security protections, and sending network traffic to unauthorized hosts.

Understanding CVE-2021-34787

This section delves into the details of the CVE-2021-34787 vulnerability.

What is CVE-2021-34787?

The vulnerability in Cisco ASA Software and FTD Software enables an attacker to bypass security measures through network requests.

The Impact of CVE-2021-34787

The exploit permits attackers to circumvent security restrictions, potentially sending unauthorized network traffic.

Technical Details of CVE-2021-34787

Explore the technical aspects related to CVE-2021-34787.

Vulnerability Description

Improper handling of network requests by affected devices using object group search triggers the vulnerability.

Affected Systems and Versions

Product: Cisco Adaptive Security Appliance (ASA) Software
Vendor: Cisco
Versions: All affected

Exploitation Mechanism

Attackers exploit the vulnerability by sending a specially crafted network request.

Mitigation and Prevention

Discover actionable steps to mitigate the risks posed by CVE-2021-34787.

Immediate Steps to Take

Ensure timely application of security patches and configurations to mitigate the vulnerability.

Long-Term Security Practices

Regularly update and monitor your security configurations to prevent potential bypasses.

Patching and Updates

Refer to the Cisco advisory for patches and updates to address the CVE-2021-34787 vulnerability.