CVE-2021-1488 : Security Advisory and Response

A vulnerability in the upgrade process of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, local attacker to inject commands that could be executed with root privileges on the underlying operating system (OS). This issue was reported on April 28, 2021, by Cisco.

Understanding CVE-2021-1488

This CVE highlights a security flaw in Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software, affecting Firepower 1000 and 2100 Series Appliances.

What is CVE-2021-1488?

CVE-2021-1488 is a command injection vulnerability triggered during the upgrade process of the affected software. This flaw enables a local attacker with authentication to execute arbitrary commands as a root user on the target OS, leading to potential system compromise.

The Impact of CVE-2021-1488

With a CVSS base score of 6.7, the vulnerability poses a medium severity threat. An attacker could exploit this flaw to gain escalated privileges, compromising system integrity, confidentiality, and availability.

Technical Details of CVE-2021-1488

This section delves into the specifics of the vulnerability.

Vulnerability Description

The vulnerability arises from insufficient input validation during the software upgrade process, allowing attackers to upload malicious upgrade package files to execute commands with root privileges.

Affected Systems and Versions

The affected products include Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software in the Firepower 1000 and 2100 Series Appliances. The specific affected versions are not applicable (n/a).

Exploitation Mechanism

Attackers can exploit this vulnerability by uploading a crafted upgrade package file to the targeted device, injecting malicious commands that could be executed with root privileges on the underlying OS.

Mitigation and Prevention

Taking immediate steps and implementing long-term security practices are crucial to safeguard against CVE-2021-1488.

Immediate Steps to Take

Cisco recommends applying the necessary updates and workarounds provided in the security advisory to mitigate the risk posed by this vulnerability.

Long-Term Security Practices

Regularly monitor for security advisories and patch releases from Cisco to stay informed about and protected against potential threats.

Patching and Updates

Ensure timely installation of software updates and patches from Cisco to address known vulnerabilities and enhance system security.