CVE-2020-1664 : Exploit Details and Defense Strategies
Learn about CVE-2020-1664, a stack buffer overflow vulnerability in Juniper Networks Junos OS allowing DoS attacks or execution of arbitrary code. Understand the impact, technical details, affected versions, and mitigation steps.
Juniper Networks Junos OS stack buffer overflow vulnerability in the device control daemon allows for DoS attacks or execution of arbitrary code.
Understanding CVE-2020-1664
This CVE details a vulnerability in Juniper Networks Junos OS that can be exploited by a low privilege local user, impacting various versions of the OS.
What is CVE-2020-1664?
A stack buffer overflow vulnerability in the device control daemon (DCD) on Juniper Networks Junos OS allows a low privilege local user to create a Denial of Service (DoS) against the daemon or execute arbitrary code in the system with root privilege.
The Impact of CVE-2020-1664
- CVSS Base Score: 7.8 (High)
- Access Vector: Local
- Attack Complexity: Low
- Privileges Required: Low
- Confidentiality, Integrity, and Availability Impact: High
Technical Details of CVE-2020-1664
This section delves into the specific technical aspects of the CVE.
Vulnerability Description
The vulnerability in the DCD in Junos OS allows local users to exploit a stack buffer overflow, potentially leading to DoS or code execution with root privileges.
Affected Systems and Versions
The following Junos OS versions are affected:
- 17.3 prior to 17.3R3-S9
- 17.4 prior to 17.4R2-S12, 17.4R3-S3
- 18.1 prior to 18.1R3-S11
- 18.2 prior to 18.2R3-S6
- and more up to 20.2 versions.
Exploitation Mechanism
The vulnerability can be exploited by a local, low privilege user to trigger a stack buffer overflow in the DCD, leading to DoS attacks or potential execution of arbitrary code.
Mitigation and Prevention
Steps to address and prevent exploitation of CVE-2020-1664.
Immediate Steps to Take
- Apply the provided software releases to resolve the issue.
- Implement access restrictions through firewall filters or access lists.
- Limit CLI access to trusted administrative networks.
Long-Term Security Practices
- Regularly update Junos OS to the latest secure versions.
- Implement network segregation and strict access control policies.
Patching and Updates
Ensure all systems are updated to the patched versions mentioned to mitigate the vulnerability effectively.