CVE-2020-1634 Junos OS: High-End SRX Series: Multicast traffic might cause all FPCs to reset.
An integer overflow in Junos OS on High-End SRX devices allows remote attackers to cause a denial of service via multicast traffic.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-1634?
CVE-2020-1634 is a high-severity vulnerability in Juniper Junos, published on 8 Apr 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
On High-End SRX Series devices, in specific configurations and when specific networking events or operator actions occur, an SPC receiving genuine multicast traffic may core. Subsequently, all FPCs in a chassis may reset causing a Denial of Service. This issue affects both IPv4 and IPv6. This issue affects: Juniper Networks Junos OS 12.3X48 version 12.3X48-D80 and later versions prior to 12.3X48-D95 on High-End SRX Series. This issue does not affect Branch SRX Series devices.
Weakness: CWE-190
Which versions are affected by CVE-2020-1634?
It affects 1 product.
Products include Juniper Junos.
How do I fix CVE-2020-1634?
No fix has been published for CVE-2020-1634 yet. Limit exposure of the affected software until one is available.
Is CVE-2020-1634 being exploited?
There is no known exploitation of CVE-2020-1634 in the wild and no public exploit code.
Other vulnerabilities in Juniper Junos
- CVE-2023-36845 Juniper Junos OS EX Series and SRX Series PHP External Variable Modification
- CVE-2020-1631 Juniper Junos OS Path Traversal
- CVE-2025-21590 Juniper Junos OS Improper Isolation or Compartmentalization
- CVE-2023-36851 Juniper Junos OS SRX Series Missing Authentication for Critical Function
- CVE-2023-36844 Juniper Junos OS EX Series PHP External Variable Modification
Sources
Also known as GHSA-h7f7-r6mm-7w8h.