CVE-2025-31644
📋 TL;DR
A command injection vulnerability in F5 BIG-IP Appliance mode allows authenticated administrators to execute arbitrary system commands, potentially crossing security boundaries. This affects BIG-IP systems running vulnerable versions in Appliance mode configuration.
💻 Affected Systems
- F5 BIG-IP
📦 What is this software?
Big Ip Advanced Web Application Firewall by F5
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Big Ip Advanced Web Application Firewall by F5
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Big Ip Advanced Web Application Firewall by F5
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Big Ip Application Acceleration Manager by F5
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Big Ip Application Acceleration Manager by F5
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Big Ip Application Acceleration Manager by F5
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Big Ip Application Security Manager by F5
View all CVEs affecting Big Ip Application Security Manager →
Big Ip Application Security Manager by F5
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Big Ip Application Security Manager by F5
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Big Ip Application Visibility And Reporting by F5
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Big Ip Application Visibility And Reporting by F5
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⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attacker to execute arbitrary commands with highest privileges, potentially accessing sensitive data, modifying configurations, or establishing persistence.
Likely Case
Privilege escalation within the appliance environment leading to unauthorized access to restricted system components or data.
If Mitigated
Limited impact due to proper access controls, network segmentation, and monitoring preventing successful exploitation.
🎯 Exploit Status
Requires authenticated administrator access. Command injection vulnerabilities are typically straightforward to exploit once identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to F5 advisory K000148591 for specific fixed versions
Vendor Advisory: https://my.f5.com/manage/s/article/K000148591
Restart Required: Yes
Instructions:
1. Review F5 advisory K000148591 for affected versions. 2. Upgrade to patched version. 3. Restart BIG-IP services. 4. Verify patch application.
🔧 Temporary Workarounds
Restrict Administrator Access
allLimit administrator role access to only necessary personnel and implement strong authentication controls.
Disable Appliance Mode if Not Required
allIf Appliance mode is not needed for your deployment, consider disabling it.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate BIG-IP devices
- Enforce least privilege access controls and monitor administrator activity
🔍 How to Verify
Check if Vulnerable:
Check if running in Appliance mode and compare version against F5 advisory K000148591Check Version:
tmsh show sys versionVerify Fix Applied:
Verify version is updated to patched release listed in F5 advisory📡 Detection & Monitoring
Log Indicators:
- Unusual tmsh command execution patterns
- Suspicious system command execution from iControl REST
Network Indicators:
- Anomalous outbound connections from BIG-IP management interfaces
SIEM Query:
source="bigip" AND (event_type="command_execution" OR process="tmsh") AND command="*;*" OR command="*|*" OR command="*`*"