Learn about CVE-2020-3284, a critical vulnerability in Cisco IOS XR Software that allows remote attackers to execute unsigned code during the PXE boot process. Find out the impact, affected systems, exploitation mechanism, and mitigation steps.
A vulnerability in the enhanced Preboot eXecution Environment (PXE) boot loader for Cisco IOS XR 64-bit Software could allow an unauthenticated, remote attacker to execute unsigned code during the PXE boot process on an affected device.
Understanding CVE-2020-3284
This CVE involves a critical vulnerability in Cisco IOS XR Software that could lead to the execution of unsigned code by an attacker during the PXE boot process.
What is CVE-2020-3284?
The vulnerability in the PXE boot loader for Cisco IOS XR Software allows attackers to execute unsigned code during the boot process on affected devices.
The Impact of CVE-2020-3284
The vulnerability poses a high risk as it could enable attackers to compromise the integrity, confidentiality, and availability of affected devices by executing malicious code.
Technical Details of CVE-2020-3284
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The vulnerability arises due to the lack of proper verification of internal commands during the PXE network boot process, allowing attackers to replace valid software images with malicious ones.
Affected Systems and Versions
Exploitation Mechanism
Attackers can exploit this vulnerability by compromising the PXE boot server, replacing valid software images with malicious ones, or impersonating the PXE boot server to send malicious files.
Mitigation and Prevention
Protecting systems from CVE-2020-3284 requires immediate actions and long-term security practices.
Immediate Steps to Take
Long-Term Security Practices
Patching and Updates
Ensure that both Cisco IOS XR Software and the BIOS are updated to the latest versions to mitigate the vulnerability.