CVE-2021-1449 : Exploit Details and Defense Strategies

A vulnerability in the boot logic of Cisco Access Points Software could allow an authenticated, local attacker to execute unsigned code at boot time. This could result in high confidentiality, integrity, and availability impact.

Understanding CVE-2021-1449

This CVE involves an arbitrary code execution vulnerability in Cisco Aironet Access Point Software that could be exploited by an attacker with local access to the device.

What is CVE-2021-1449?

The vulnerability in the boot logic of Cisco Access Points Software allows an attacker to execute unsigned code during boot time by bypassing software image verification checks.

The Impact of CVE-2021-1449

The vulnerability poses a medium severity threat with a CVSS base score of 6.7. It could lead to high impact on confidentiality, integrity, and availability of affected systems.

Technical Details of CVE-2021-1449

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

The flaw arises from an improper check in the code managing system startup processes, enabling an attacker to execute unsigned code by modifying a specific file on the system.

Affected Systems and Versions

The vulnerability affects Cisco Aironet Access Point Software with all versions.

Exploitation Mechanism

To exploit this vulnerability, an attacker needs access to the development shell (devshell) on the device.

Mitigation and Prevention

Here are some critical steps to address and prevent this vulnerability.

Immediate Steps to Take

Cisco has not reported any known public exploits, but it is crucial to apply security updates promptly.

Long-Term Security Practices

Ensure restricted access to development shells to limit attacker capabilities.
Regularly monitor and update system software to patch known vulnerabilities.

Patching and Updates

Refer to the Cisco security advisory and apply the necessary patches to mitigate the risk associated with this vulnerability.