CVE-2023-40953
📋 TL;DR
CVE-2023-40953 is a Cross-Site Request Forgery (CSRF) vulnerability in icms 7.0.16 that allows attackers to trick authenticated users into performing unintended actions, such as modifying settings or data, without their consent. It affects users of icms 7.0.16 who are logged into the system. This vulnerability can lead to unauthorized changes if exploited via malicious web requests.
💻 Affected Systems
- icms
📦 What is this software?
Icms by Idreamsoft
⚠️ Risk & Real-World Impact
Worst Case
An attacker could perform administrative actions like changing passwords, deleting content, or altering system configurations, potentially leading to data loss or complete system compromise.
Likely Case
Attackers may modify user profiles, post unauthorized content, or alter settings, causing disruption and data integrity issues.
If Mitigated
With proper CSRF protections like anti-CSRF tokens, the impact is minimal as requests would be blocked, preventing unauthorized actions.
🎯 Exploit Status
Exploitation requires the victim to be authenticated; public proof-of-concept details are available in the provided references, making it easy for attackers to craft malicious requests.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor for updates beyond 7.0.16
Vendor Advisory: https://www.icmsdev.com/
Restart Required: No
Instructions:
1. Visit the icms vendor website for the latest security patches. 2. Apply the patch as per vendor instructions. 3. Verify the fix by testing CSRF protections.
🔧 Temporary Workarounds
Implement Anti-CSRF Tokens
allAdd unique tokens to forms and validate them on the server to prevent CSRF attacks.
Modify icms source code to include CSRF tokens in forms and validate them in backend scripts.
Use SameSite Cookies
allSet cookies with SameSite attribute to restrict cross-site requests.
Set cookie attributes in web server configuration, e.g., in Apache: Header edit Set-Cookie ^(.*)$ $1; SameSite=Strict
🧯 If You Can't Patch
- Restrict access to icms admin interfaces to trusted IP addresses only.
- Educate users about phishing risks and advise them to log out after sessions.
🔍 How to Verify
Check if Vulnerable:
Review icms version; if it is 7.0.16, it is vulnerable. Test by attempting CSRF attacks with tools like Burp Suite.Check Version:
Check the icms version in the admin panel or configuration files.Verify Fix Applied:
After patching, test CSRF protections by trying to submit forged requests; they should be rejected.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests from unexpected referrers or without CSRF tokens in logs.
Network Indicators:
- Suspicious cross-origin requests to icms endpoints.
SIEM Query:
Example: search for POST requests to icms with referrer not matching the site domain.