CVE-2023-27259
📋 TL;DR
This vulnerability allows unauthenticated attackers to extract sensitive student and teacher data from IDAttend's IDWeb application. It affects organizations using IDWeb version 3.1.052 and earlier due to missing authentication in the GetAssignmentsDue method.
💻 Affected Systems
- IDAttend IDWeb
📦 What is this software?
Idweb by Idattend
⚠️ Risk & Real-World Impact
Worst Case
Mass exfiltration of personally identifiable information (PII) including student and teacher data, leading to privacy violations, regulatory fines, and reputational damage.
Likely Case
Unauthorized access to sensitive educational records and personal information that could be used for identity theft or social engineering attacks.
If Mitigated
Limited to no data exposure if proper network segmentation and authentication controls are implemented.
🎯 Exploit Status
The vulnerability requires no authentication and minimal technical skill to exploit via direct API calls.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.1.053 or later
Vendor Advisory: https://www.themissinglink.com.au/security-advisories/cve-2023-27259
Restart Required: Yes
Instructions:
1. Download the latest version from IDAttend vendor. 2. Backup current installation and data. 3. Install the updated version. 4. Restart the IDWeb service or application server.
🔧 Temporary Workarounds
Network Access Control
allRestrict access to IDWeb application using firewall rules to only trusted IP addresses.
Web Application Firewall
allImplement WAF rules to block unauthenticated requests to the GetAssignmentsDue endpoint.
🧯 If You Can't Patch
- Isolate the IDWeb application in a segmented network zone with strict access controls.
- Implement additional authentication layer (reverse proxy with authentication) in front of the vulnerable application.
🔍 How to Verify
Check if Vulnerable:
Check IDWeb version in application settings or about page. If version is 3.1.052 or earlier, the system is vulnerable.Check Version:
Check application interface or configuration files for version information.Verify Fix Applied:
Verify version is 3.1.053 or later and test that unauthenticated requests to GetAssignmentsDue endpoint return authentication errors.📡 Detection & Monitoring
Log Indicators:
- Unauthenticated requests to GetAssignmentsDue endpoint
- Unusual data access patterns from unauthenticated sources
- Large data transfers from IDWeb application
Network Indicators:
- HTTP requests to GetAssignmentsDue without authentication headers
- Unusual outbound traffic from IDWeb server containing structured data
SIEM Query:
source="idweb.log" AND (uri="/GetAssignmentsDue" OR uri="*GetAssignmentsDue*") AND NOT (user!="" OR auth_token!="")