CVE-2020-1671 Explained : Impact and Mitigation
Learn about CVE-2020-1671, a vulnerability in Juniper Networks Junos OS affecting DHCPv6 configurations, potentially leading to service disruptions. Find mitigation steps and software updates.
CVE-2020-1671, titled 'Junos OS: Receipt of malformed DHCPv6 packets causes jdhcpd to crash.', involves a vulnerability in Juniper Networks Junos OS affecting DHCPv6 local server and Relay Agent configurations.
Understanding CVE-2020-1671
What is CVE-2020-1671?
Juniper Networks Junos OS platforms, when configured as DHCPv6 local server or Relay Agent, may experience a crash in the JDHCPD process upon receiving malformed DHCPv6 packets, leading to the restart of the daemon.
The Impact of CVE-2020-1671
The vulnerability impacts Juniper Networks Junos OS versions 17.4 to 20.1, potentially resulting in a denial of service if exploited.
Technical Details of CVE-2020-1671
Vulnerability Description
- Crash in JDHCPD process due to malformed DHCPv6 packets
Affected Systems and Versions
- Junos OS versions prior to specified releases for each affected version
Exploitation Mechanism
- Malformed DHCPv6 packets triggering JDHCPD process crash
Mitigation and Prevention
Immediate Steps to Take
- Apply software releases listed in the solution to resolve the issue
Long-Term Security Practices
- Regularly update Junos OS to latest patched versions
- Monitor vendor advisories for any potential vulnerabilities
- Implement proper network traffic filtering to limit exposure
Patching and Updates
- Software releases 17.4R2-S12 and later address the vulnerability