CVE-2021-47754
📋 TL;DR
CVE-2021-47754 is a cross-site request forgery (CSRF) vulnerability in Arunna 1.0.0 that allows attackers to manipulate authenticated users into submitting malicious forms. This enables unauthorized changes to user profiles including passwords, email addresses, and administrative privileges. All users running Arunna 1.0.0 are affected.
💻 Affected Systems
- Arunna
📦 What is this software?
Arunna by Arunna
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain administrative privileges, take over user accounts, and potentially compromise the entire system by changing passwords and email addresses.
Likely Case
Attackers hijack user accounts by changing passwords and email addresses, leading to unauthorized access and data exposure.
If Mitigated
With proper CSRF protections, attackers cannot forge requests, maintaining normal authentication and authorization controls.
🎯 Exploit Status
Exploitation requires tricking authenticated users into visiting malicious pages with crafted forms.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.0.1 or later
Vendor Advisory: https://github.com/arunna/arunna
Restart Required: Yes
Instructions:
1. Backup current installation. 2. Download latest version from GitHub. 3. Replace vulnerable files with patched version. 4. Restart the application.
🔧 Temporary Workarounds
Implement CSRF Tokens
allAdd CSRF tokens to all state-changing forms and validate them server-side.
Modify form templates to include CSRF tokens and update server-side validation logic
SameSite Cookie Attribute
allSet SameSite=Strict or Lax on session cookies to prevent cross-site requests.
Set session cookie with SameSite=Strict attribute in application configuration
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to detect and block CSRF attempts
- Require re-authentication for sensitive actions like password changes
🔍 How to Verify
Check if Vulnerable:
Check if running Arunna 1.0.0 and forms lack CSRF protection tokens.Check Version:
Check package.json or application configuration for version numberVerify Fix Applied:
Verify version is 1.0.1 or later and forms include CSRF tokens that are validated.📡 Detection & Monitoring
Log Indicators:
- Multiple failed form submissions from same IP
- Unusual profile modification patterns
Network Indicators:
- Requests to profile endpoints without proper referrer headers
- Cross-origin form submissions
SIEM Query:
sourceIP=* AND (uri="*/profile/update" OR uri="*/password/change") AND referrer NOT CONTAINS "yourdomain.com"🔗 References
- https://github.com/arunna/arunna
- https://web.archive.org/web/20211216074128/https://lyhinslab.org/index.php/2021/11/29/how-white-box-hacking-works-xss-csrf-in-arunna/
- https://www.exploit-db.com/exploits/50608
- https://web.archive.org/web/20211216074128/https://lyhinslab.org/index.php/2021/11/29/how-white-box-hacking-works-xss-csrf-in-arunna/
- https://www.exploit-db.com/exploits/50608
