CVE-2020-3545 : What You Need to Know
Learn about CVE-2020-3545, a vulnerability in Cisco FXOS Software allowing attackers to execute arbitrary code with root privileges. Find mitigation steps and long-term security practices here.
A vulnerability in Cisco FXOS Software could allow an authenticated, local attacker with administrative credentials to cause a buffer overflow condition.
Understanding CVE-2020-3545
This CVE involves a buffer overflow vulnerability in Cisco Firepower Extensible Operating System (FXOS) software.
What is CVE-2020-3545?
The vulnerability in Cisco FXOS Software results from incorrect bounds checking of values parsed from a specific file, potentially leading to a stack-based buffer overflow. An attacker with administrative credentials could exploit this to execute arbitrary code on the underlying operating system with root privileges.
The Impact of CVE-2020-3545
The vulnerability has a CVSS base score of 6.0, indicating a medium severity issue with high confidentiality and integrity impacts. However, the attack complexity is low, and no user interaction is required.
Technical Details of CVE-2020-3545
This section provides more technical insights into the vulnerability.
Vulnerability Description
The vulnerability allows an attacker to trigger a buffer overflow by supplying a crafted file, potentially leading to arbitrary code execution with root privileges.
Affected Systems and Versions
- Product: Cisco Firepower Extensible Operating System (FXOS)
- Vendor: Cisco
- Affected Version: Not applicable (n/a)
Exploitation Mechanism
The attacker needs valid administrative credentials to exploit the vulnerability by providing a malicious file for processing.
Mitigation and Prevention
Protecting systems from CVE-2020-3545 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply vendor-provided patches or updates promptly.
- Restrict access to administrative credentials to trusted users.
- Monitor network traffic for any suspicious activities.
Long-Term Security Practices
- Regularly update and patch software to address known vulnerabilities.
- Implement strong access controls and least privilege principles.
- Conduct security training for staff to recognize and respond to potential threats.
- Employ intrusion detection and prevention systems.
Patching and Updates
Regularly check for security advisories from Cisco and apply recommended patches to mitigate the vulnerability.