Junos OS (SRX firewalls)
CVE-2024-47497: SRX Series, QFX Series, MX Series and EX Series: Receiving specific HTTPS traffic causes resource exhaustion
An Uncontrolled Resource Consumption vulnerability in the http daemon (httpd) of Juniper Networks Junos OS on SRX Series, QFX Series, MX Series and EX Series allows an unauthenticated, network-based attacker to cause Denial-of-Service (DoS).
Published
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| Junos OS (SRX Series, EX Series, QFX Series, MX Series) 0 | 21.4R3-S7 or later |
| Junos OS (SRX Series, EX Series, QFX Series, MX Series) 22.2 | 22.2R3-S4 or later |
| Junos OS (SRX Series, EX Series, QFX Series, MX Series) 22.3 | 22.3R3-S3 or later |
| Junos OS (SRX Series, EX Series, QFX Series, MX Series) 22.4 | 22.4R3-S2 or later |
| Junos OS (SRX Series, EX Series, QFX Series, MX Series) 23.2 | 23.2R2-S1 or later |
| Junos OS (SRX Series, EX Series, QFX Series, MX Series) 23.4 | 23.4R1-S2, 23.4R2 or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
An Uncontrolled Resource Consumption vulnerability in the http daemon (httpd) of Juniper Networks Junos OS on SRX Series, QFX Series, MX Series and EX Series allows an unauthenticated, network-based attacker to cause Denial-of-Service (DoS).
An attacker can send specific HTTPS connection requests to the device, triggering the creation of processes that are not properly terminated. Over time, this leads to resource exhaustion, ultimately causing the device to crash and restart.
The following command can be used to monitor the resource usage: user@host> show system processes extensive | match mgd | count
This issue affects Junos OS on SRX Series and EX Series: All versions before 21.4R3-S7, from 22.2 before 22.2R3-S4, from 22.3 before 22.3R3-S3, from 22.4 before 22.4R3-S2, from 23.2 before 23.2R2-S1, from 23.4 before 23.4R1-S2, 23.4R2.
Am I affected?
Required config: [ system services web-management https ... ]
Workarounds
There are no known workarounds for this issue.
To reduce the risk of exploitation of this issue, use access lists or firewall filters to limit access to only trusted networks, hosts and users.
Exploitation
Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 13 Oct 2026.