CVE-2021-1435 : What You Need to Know
Learn about CVE-2021-1435, a critical command injection vulnerability in Cisco IOS XE Software's web UI, enabling attackers to execute arbitrary commands as root users.
A vulnerability in the web UI of Cisco IOS XE Software allows an authenticated, remote attacker to inject arbitrary commands, potentially leading to the execution of commands as the root user.
Understanding CVE-2021-1435
This CVE highlights a command injection vulnerability in Cisco IOS XE Software that poses a serious security risk.
What is CVE-2021-1435?
CVE-2021-1435 refers to a weakness in Cisco IOS XE Software's web UI that permits attackers to inject and execute unauthorized commands as the root user due to inadequate input validation.
The Impact of CVE-2021-1435
If successfully exploited, this vulnerability could allow malicious actors to execute arbitrary commands with elevated privileges, potentially compromising the affected system's confidentiality, integrity, and availability.
Technical Details of CVE-2021-1435
This section covers specific technical details associated with CVE-2021-1435.
Vulnerability Description
The vulnerability allows authenticated attackers to inject malicious commands via the web UI, leading to the execution of unauthorized commands with root user privileges.
Affected Systems and Versions
The affected product is Cisco IOS XE Software with all versions being vulnerable to this exploit.
Exploitation Mechanism
Attackers can exploit this vulnerability by sending crafted requests to the web UI of the affected device, injecting arbitrary commands into the request to gain unauthorized access.
Mitigation and Prevention
Protecting systems from CVE-2021-1435 requires immediate action and long-term security measures.
Immediate Steps to Take
Immediately update Cisco IOS XE Software to the latest version and restrict access to the web UI to authorized personnel only.
Long-Term Security Practices
Implement strict input validation mechanisms, perform regular security audits, and educate users on safe browsing and networking practices.
Patching and Updates
Regularly monitor vendor security advisories and apply patches promptly to mitigate the risk of exploitation.