CVE-2017-20049
📋 TL;DR
This vulnerability in legacy Axis devices allows remote attackers to bypass privilege management through manipulation of CGI scripts. It affects specific Axis camera models like P3225 and M3005, enabling unauthorized access to device functions. The high CVSS score indicates critical severity requiring immediate attention.
💻 Affected Systems
- Axis P3225
- Axis M3005
- Other legacy Axis devices with similar CGI implementation
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing attacker to execute arbitrary commands, modify configurations, access video feeds, and use device as pivot point into network.
Likely Case
Unauthorized access to device administration, configuration changes, and potential video feed interception.
If Mitigated
Limited impact if devices are isolated in separate VLANs with strict network access controls and monitoring.
🎯 Exploit Status
Remote exploitation without authentication makes this highly attractive to attackers. CGI script manipulation is a common attack vector.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Axis security advisory for specific firmware versions
Vendor Advisory: https://www.axis.com/dam/public/df/f3/dd/cve-2017-20049-en-US-376956.pdf
Restart Required: Yes
Instructions:
1. Access Axis device web interface. 2. Navigate to System > Maintenance > Firmware Upgrade. 3. Download latest firmware from Axis website. 4. Upload and install firmware. 5. Reboot device after installation.
🔧 Temporary Workarounds
Network Segmentation
allIsolate Axis devices in separate VLAN with strict firewall rules limiting access to management interfaces.
Disable Web Interface
allIf web management not required, disable HTTP/HTTPS access to device management interface.
🧯 If You Can't Patch
- Implement strict network access controls allowing only trusted IPs to access device management interface
- Enable detailed logging and monitoring for unauthorized access attempts to CGI scripts
🔍 How to Verify
Check if Vulnerable:
Check device model and firmware version against Axis security advisory. Attempt to access CGI scripts with unauthorized requests.Check Version:
Access device web interface > System > About to view firmware versionVerify Fix Applied:
Verify firmware version is updated to patched version from Axis advisory. Test CGI script access to confirm privilege management is enforced.📡 Detection & Monitoring
Log Indicators:
- Unauthorized CGI script access attempts
- Privilege escalation attempts in system logs
- Multiple failed authentication attempts followed by successful CGI access
Network Indicators:
- Unusual HTTP requests to CGI endpoints
- Traffic from unexpected sources to device management ports
- Patterns of script manipulation in HTTP headers
SIEM Query:
source="axis_device" AND (uri="*.cgi" OR uri="*/cgi-bin/*") AND (status=200 OR status=302) AND user="anonymous"