CVE-2021-29756
📋 TL;DR
This CSRF vulnerability in IBM Cognos Analytics allows attackers to trick authenticated users into performing unauthorized actions on the My Inbox page. It affects IBM Cognos Analytics 11.1.7 and 11.2.0 installations, potentially enabling attackers to manipulate data or perform administrative functions through the victim's session.
💻 Affected Systems
- IBM Cognos Analytics
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attacker could manipulate or delete critical business data, modify user permissions, or perform administrative actions leading to data breach or system compromise.
Likely Case
Attacker could trick users into performing unwanted actions like modifying reports, changing configurations, or accessing unauthorized data.
If Mitigated
With proper CSRF protections and user awareness, impact is limited to unsuccessful attack attempts.
🎯 Exploit Status
CSRF attacks typically require user interaction but are straightforward to implement once the vulnerable endpoint is identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply security updates as per IBM advisory
Vendor Advisory: https://www.ibm.com/support/pages/node/6520510
Restart Required: Yes
Instructions:
1. Review IBM advisory 2. Apply recommended security updates 3. Restart Cognos services 4. Verify fix implementation
🔧 Temporary Workarounds
Implement CSRF Tokens
allAdd anti-CSRF tokens to forms and validate them server-side
SameSite Cookie Attribute
allSet SameSite=Strict or Lax attributes on session cookies
🧯 If You Can't Patch
- Implement web application firewall with CSRF protection rules
- Educate users about CSRF risks and safe browsing practices
🔍 How to Verify
Check if Vulnerable:
Check if running affected versions (11.1.7 or 11.2.0) and test My Inbox page for CSRF protectionsCheck Version:
Check Cognos Administration console or installation logs for version informationVerify Fix Applied:
Verify updated version and test CSRF protections on My Inbox page📡 Detection & Monitoring
Log Indicators:
- Unusual requests to My Inbox endpoints from unexpected referrers
- Multiple failed state-changing operations
Network Indicators:
- Requests with missing or invalid anti-CSRF tokens
- Cross-origin requests to My Inbox endpoints
SIEM Query:
source="cognos.log" AND (uri="/myinbox" OR uri="/inbox") AND referer NOT CONTAINS "expected-domain.com"🔗 References
- https://exchange.xforce.ibmcloud.com/vulnerabilities/202167
- https://security.netapp.com/advisory/ntap-20211223-0006/
- https://www.ibm.com/support/pages/node/6520510
- https://exchange.xforce.ibmcloud.com/vulnerabilities/202167
- https://security.netapp.com/advisory/ntap-20211223-0006/
- https://www.ibm.com/support/pages/node/6520510
