CVE-2025-15349
📋 TL;DR
A race condition vulnerability in Anritsu ShockLine's SCPI component allows network-adjacent attackers to execute arbitrary code without authentication. This affects Anritsu ShockLine installations where the vulnerable SCPI interface is accessible. Attackers can exploit improper locking mechanisms to gain code execution in the current process context.
💻 Affected Systems
- Anritsu ShockLine
📦 What is this software?
Shockline by Anritsu
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise allowing attackers to execute arbitrary code, potentially gaining persistent access, disrupting test operations, or pivoting to other network segments.
Likely Case
Remote code execution leading to service disruption, data theft, or installation of malware on the ShockLine device.
If Mitigated
Limited impact if proper network segmentation and access controls prevent network-adjacent attackers from reaching the vulnerable interface.
🎯 Exploit Status
Exploitation requires network adjacency and race condition triggering. ZDI-CAN-27315 indicates coordinated disclosure through Zero Day Initiative.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific patched versions
Vendor Advisory: https://www.anritsu.com/en-us/support/security-advisories (check for specific advisory)
Restart Required: Yes
Instructions:
1. Check Anritsu security advisory for specific patch version
2. Download firmware update from Anritsu support portal
3. Apply firmware update following vendor instructions
4. Restart ShockLine device to activate patch
🔧 Temporary Workarounds
Network Segmentation
allIsolate ShockLine devices on separate VLAN or network segment to prevent network-adjacent access
Access Control Lists
allImplement firewall rules to restrict SCPI interface access to authorized management systems only
🧯 If You Can't Patch
- Implement strict network segmentation to isolate ShockLine devices from untrusted networks
- Monitor network traffic to/from ShockLine SCPI interfaces for anomalous activity
🔍 How to Verify
Check if Vulnerable:
Check firmware version against vendor advisory. If running unpatched version and SCPI interface is network-accessible, assume vulnerable.Check Version:
Check device web interface or use SCPI command :SYSTem:VERSion? (vendor-specific)Verify Fix Applied:
Verify firmware version matches patched version specified in vendor advisory and test SCPI functionality.📡 Detection & Monitoring
Log Indicators:
- Unusual SCPI command patterns
- Multiple rapid connection attempts to SCPI interface
- Unexpected process creation on ShockLine device
Network Indicators:
- Unusual traffic to ShockLine SCPI port (typically TCP 5025)
- Multiple rapid SCPI commands from single source
- Network traffic patterns suggesting race condition exploitation
SIEM Query:
source_ip="*" AND dest_port=5025 AND (rate_threshold>10 OR pattern="concurrent_commands")