CVE-2017-2300 : What You Need to Know
Learn about CVE-2017-2300 affecting Juniper Networks SRX Series Services Gateways running Junos OS. Find out the impact, affected versions, and mitigation steps.
Juniper Networks SRX Series Services Gateways chassis clusters running Junos OS versions 12.1X46-D65, 12.3X48-D40, and 12.3X48-D60 are susceptible to a flowd daemon crash vulnerability.
Understanding CVE-2017-2300
This CVE involves a denial of service vulnerability affecting Juniper Networks SRX Series Services Gateways.
What is CVE-2017-2300?
The vulnerability in Junos OS versions prior to specific releases can lead to a crash and restart of the flowd daemon on the primary node of an SRX Series chassis cluster.
The Impact of CVE-2017-2300
Chassis clusters on affected devices may experience disruptions due to the flowd daemon crashing and restarting, triggered by attempting to sync a crafted multicast session.
Technical Details of CVE-2017-2300
This section delves into the technical aspects of the vulnerability.
Vulnerability Description
The issue arises when the cluster attempts to synchronize a multicast session created using specially crafted multicast packets, leading to a crash and restart of the flowd daemon on the primary node.
Affected Systems and Versions
- Product: Junos OS on SRX Series Services Gateways chassis cluster
- Vendor: Juniper Networks
- Vulnerable Versions:
- 12.1X46 prior to 12.1X46-D65
- 12.3X48 prior to 12.3X48-D40
- 12.3X48 prior to 12.3X48-D60
Exploitation Mechanism
The vulnerability can be exploited by sending specifically crafted multicast packets to the affected device, triggering the flowd daemon crash.
Mitigation and Prevention
Protecting systems from CVE-2017-2300 involves taking immediate and long-term security measures.
Immediate Steps to Take
- Apply the necessary patches provided by Juniper Networks.
- Monitor network traffic for any signs of exploitation.
Long-Term Security Practices
- Regularly update Junos OS to the latest recommended versions.
- Implement network segmentation to contain potential attacks.
Patching and Updates
- Juniper Networks has released patches to address this vulnerability.
- Ensure timely application of these patches to safeguard the affected systems.