CVE-2021-34725 : What You Need to Know
Discover the details of CVE-2021-34725, a critical vulnerability in Cisco IOS XE SD-WAN Software that allows attackers to execute arbitrary commands with root-level privileges. Learn about the impact, technical aspects, and mitigation strategies.
A vulnerability in the CLI of Cisco IOS XE SD-WAN Software could allow an authenticated, local attacker to inject arbitrary commands to be executed with root-level privileges on the underlying operating system.
Understanding CVE-2021-20657
This CVE refers to a command injection vulnerability in Cisco IOS XE SD-WAN Software that could lead to the execution of arbitrary commands with elevated privileges.
What is CVE-2021-20657?
The vulnerability allows an authenticated local attacker to insert and execute arbitrary commands with root-level access by exploiting insufficient input validation on specific CLI commands.
The Impact of CVE-2021-20657
A successful exploitation of this vulnerability could enable the attacker to run commands with root-level privileges on the affected device, posing a significant security risk.
Technical Details of CVE-2021-20657
This section covers the specific technical aspects of the vulnerability.
Vulnerability Description
The vulnerability exists in the CLI of Cisco IOS XE SD-WAN Software due to inadequate input validation on certain commands, allowing attackers to execute arbitrary commands with elevated privileges.
Affected Systems and Versions
The affected product is Cisco IOS XE SD-WAN Software, and all versions are vulnerable to this command injection issue.
Exploitation Mechanism
An authenticated attacker can leverage the lack of input validation on CLI commands to craft and submit malicious input, thereby executing arbitrary commands with root-level access.
Mitigation and Prevention
To address CVE-2021-20657, immediate actions and long-term security practices are essential.
Immediate Steps to Take
Administrators should apply necessary security patches and closely monitor privileged user activities to prevent unauthorized command injections.
Long-Term Security Practices
Implementing strict access controls, conducting regular security assessments, and educating users on best security practices can enhance overall system security.
Patching and Updates
Regularly check for updates from Cisco, apply recommended patches promptly, and follow security advisories to stay informed about potential vulnerabilities and fixes.