CVE-2020-3473 : Security Advisory and Response
Learn about CVE-2020-3473, a high-severity vulnerability in Cisco IOS XR Software allowing local users to gain administrative control. Find mitigation steps and patching advice here.
A vulnerability in task group assignment for a specific CLI command in Cisco IOS XR Software could allow an authenticated, local CLI shell user to elevate privileges and gain full administrative control of the device.
Understanding CVE-2020-3473
This CVE involves an authenticated user privilege escalation vulnerability in Cisco IOS XR Software.
What is CVE-2020-3473?
The vulnerability in Cisco IOS XR Software allows a local CLI shell user to elevate privileges by exploiting incorrect mapping of a command to task groups within the source code.
The Impact of CVE-2020-3473
- CVSS Base Score: 7.8 (High Severity)
- Attack Vector: Local
- Confidentiality Impact: High
- Integrity Impact: High
- Availability Impact: High
- Privileges Required: Low
- Successful exploitation could lead to unauthorized actions on the device.
Technical Details of CVE-2020-3473
This section provides more technical insights into the vulnerability.
Vulnerability Description
The vulnerability arises from incorrect mapping of a command to task groups in the source code, allowing an attacker to bypass task group-based checks.
Affected Systems and Versions
- Affected Product: Cisco IOS XR Software
- Affected Vendor: Cisco
- Affected Version: Not applicable
Exploitation Mechanism
An attacker needs to authenticate to the local CLI shell on the device and use a specific CLI command to exploit the vulnerability.
Mitigation and Prevention
Protecting systems from CVE-2020-3473 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply vendor-provided patches or updates promptly.
- Monitor network traffic for any signs of exploitation.
- Restrict access to CLI shell to authorized personnel only.
Long-Term Security Practices
- Regularly update and patch all software and firmware.
- Conduct security training for staff to recognize and report suspicious activities.
- Implement the principle of least privilege to limit user access.
- Employ network segmentation to contain potential breaches.
Patching and Updates
- Cisco has likely released patches to address this vulnerability. Ensure all relevant patches are applied to affected systems.