CVE-2025-59975
📋 TL;DR
An unauthenticated attacker can flood Juniper Junos Space with HTTP API requests, consuming all file handles and causing a complete denial of service. This affects all management interfaces (SSH and WebUI), requiring manual reboot to restore functionality. Affected systems include Junos Space versions before 22.2R1 Patch V3 and 23.1 before 23.1R1 Patch V3.
💻 Affected Systems
- Juniper Networks Junos Space
📦 What is this software?
Junos Space by Juniper
Junos Space by Juniper
Junos Space by Juniper
⚠️ Risk & Real-World Impact
Worst Case
Complete system unavailability requiring physical access and manual reboot, with extended downtime during attack and recovery.
Likely Case
Management interface DoS preventing administrative access until system is manually rebooted.
If Mitigated
Limited impact if network controls block unauthenticated API access and rate limiting is implemented.
🎯 Exploit Status
Simple flooding attack requiring only network access to the management interface. No authentication or special tools needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 22.2R1 Patch V3 or later, 23.1R1 Patch V3 or later
Vendor Advisory: https://supportportal.juniper.net/JSA103172
Restart Required: Yes
Instructions:
1. Download appropriate patch from Juniper support portal. 2. Apply patch via Junos Space administration interface. 3. Reboot system as required by patch installation.
🔧 Temporary Workarounds
Network Access Control
allRestrict access to Junos Space management interfaces to trusted networks only
Rate Limiting
allImplement network-level rate limiting for HTTP/API traffic to Junos Space
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Junos Space from untrusted networks
- Deploy network-based DDoS protection or WAF with rate limiting capabilities
🔍 How to Verify
Check if Vulnerable:
Check Junos Space version via SSH or WebUI and compare against affected versionsCheck Version:
show versionVerify Fix Applied:
Verify installed version is 22.2R1 Patch V3 or later, or 23.1R1 Patch V3 or later📡 Detection & Monitoring
Log Indicators:
- Unusually high HTTP connection rates
- File handle exhaustion warnings
- Failed SSH/WebUI login attempts due to resource constraints
Network Indicators:
- High volume of HTTP requests to management IP
- Sustained connection attempts to API endpoints
SIEM Query:
source="junos-space" AND (http_requests > 1000/min OR error="file handles exhausted")