CVE-2020-3393 : Security Advisory and Response
Learn about CVE-2020-3393, a privilege escalation vulnerability in Cisco IOS XE Software, allowing attackers to gain root access. Find mitigation steps and long-term security practices.
A vulnerability in the application-hosting subsystem of Cisco IOS XE Software could allow an authenticated, local attacker to elevate privileges to root on an affected device.
Understanding CVE-2020-3393
This CVE involves a privilege escalation vulnerability in Cisco IOS XE Software's application-hosting subsystem.
What is CVE-2020-3393?
The vulnerability allows a local attacker to gain root privileges on the device by executing commands outside the application-hosting subsystem Docker container and on the underlying Linux OS.
The Impact of CVE-2020-3393
- CVSS Base Score: 6.0 (Medium Severity)
- Attack Vector: Local
- Confidentiality Impact: High
- Integrity Impact: High
- Privileges Required: High
- Scope: Unchanged
- User Interaction: None
- Attack Complexity: Low
- Availability Impact: None
Technical Details of CVE-2020-3393
This section provides more in-depth technical details of the vulnerability.
Vulnerability Description
The vulnerability results from incomplete input validation of user payload in CLI commands and improper role-based access control within the application-hosting subsystem.
Affected Systems and Versions
- Affected Product: Cisco IOS XE Software
- Affected Version: Not Applicable
Exploitation Mechanism
An attacker can exploit this vulnerability by using a crafted CLI command with valid user credentials to execute arbitrary commands with root privileges.
Mitigation and Prevention
Protecting systems from CVE-2020-3393 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply vendor patches and updates promptly.
- Monitor for any unauthorized access or unusual activities.
Long-Term Security Practices
- Implement the principle of least privilege to restrict user access.
- Regularly review and update access control policies.
- Conduct security training for users on identifying and reporting suspicious activities.
Patching and Updates
Regularly check for security advisories and updates from Cisco to patch vulnerabilities and enhance system security.