CVE-2021-1495 : What You Need to Know
CVE-2021-1495 is a vulnerability in Cisco products allowing attackers to bypass HTTP file policies by exploiting Snort engine. Learn about impact, technical details, affected systems, and mitigation.
A vulnerability in the Snort detection engine of multiple Cisco products could allow an unauthenticated remote attacker to bypass a configured file policy for HTTP. This article provides details on the impact, technical description, affected systems, exploitation mechanism, mitigation, and prevention steps.
Understanding CVE-2021-1495
This section delves into the specifics of the CVE-2021-1495 vulnerability.
What is CVE-2021-1495?
CVE-2021-1495 is a vulnerability in multiple Cisco products that allows an attacker to bypass a configured file policy for HTTP by exploiting incorrect handling of specific HTTP header parameters.
The Impact of CVE-2021-1495
The vulnerability could enable an attacker to bypass configured file policies for HTTP packets and deliver malicious payloads, posing a significant security risk to affected systems.
Technical Details of CVE-2021-1495
This section outlines the technical aspects of the CVE-2021-1495 vulnerability.
Vulnerability Description
The vulnerability arises due to incorrect handling of specific HTTP header parameters in the Snort detection engine, allowing attackers to send crafted HTTP packets through affected devices.
Affected Systems and Versions
The vulnerability affects Cisco Firepower Threat Defense Software with the status 'affected', potentially exposing systems to exploitation.
Exploitation Mechanism
Attackers can exploit CVE-2021-1495 by sending maliciously crafted HTTP packets through vulnerable devices, bypassing configured file policies for HTTP.
Mitigation and Prevention
This section provides insights on how to mitigate and prevent the risks associated with CVE-2021-1495.
Immediate Steps to Take
Organizations are advised to implement relevant security patches and configurations to address the vulnerability promptly.
Long-Term Security Practices
Establishing robust network security measures, monitoring for anomalous network behavior, and staying informed about security advisories are essential for long-term security.
Patching and Updates
Regularly applying software updates, security patches, and following vendor advisories can help prevent exploitation of known vulnerabilities.