CVE-2023-26580
📋 TL;DR
CVE-2023-26580 is an unauthenticated arbitrary file read vulnerability in IDAttend's IDWeb application version 3.1.013. This allows attackers without credentials to read any file on the web server, potentially exposing sensitive configuration files, credentials, or other confidential data. Organizations using IDWeb 3.1.013 are affected.
💻 Affected Systems
- IDAttend IDWeb
📦 What is this software?
Idweb by Idattend
⚠️ Risk & Real-World Impact
Worst Case
Attackers could read sensitive files like configuration files containing database credentials, private keys, or user data, leading to full system compromise, data breaches, or lateral movement within the network.
Likely Case
Attackers will read configuration files to extract credentials or sensitive information, potentially leading to unauthorized access to databases or other systems.
If Mitigated
With proper network segmentation and access controls, the impact is limited to the web server's file system, though sensitive data exposure remains a concern.
🎯 Exploit Status
The vulnerability is unauthenticated and allows arbitrary file reads, making exploitation straightforward with minimal technical skill required.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in references, but vendor likely provides an update
Vendor Advisory: https://www.themissinglink.com.au/security-advisories/cve-2023-26580
Restart Required: Yes
Instructions:
1. Contact IDAttend vendor for the patched version. 2. Backup current configuration and data. 3. Apply the update following vendor instructions. 4. Restart the IDWeb service or server.
🔧 Temporary Workarounds
Network Access Restriction
linuxRestrict network access to the IDWeb application to trusted IP addresses only using firewall rules.
iptables -A INPUT -p tcp --dport <IDWeb_port> -s <trusted_IP> -j ACCEPT
iptables -A INPUT -p tcp --dport <IDWeb_port> -j DROP
Web Server Configuration Hardening
allConfigure the web server to deny access to sensitive directories and file types.
Add deny rules in .htaccess or web server config for paths like /etc/, /proc/, etc.
🧯 If You Can't Patch
- Isolate the IDWeb server in a segmented network zone with strict inbound/outbound controls.
- Implement web application firewall (WAF) rules to block requests attempting file path traversal patterns.
🔍 How to Verify
Check if Vulnerable:
Test by attempting to read a known file (e.g., /etc/passwd on Linux) via the IDWeb interface without authentication. If successful, the system is vulnerable.Check Version:
Check the IDWeb application version via its admin interface or configuration files; specific command depends on deployment.Verify Fix Applied:
After patching, repeat the test; successful file reads should be blocked, and the application should return an error or deny access.📡 Detection & Monitoring
Log Indicators:
- Unusual file access patterns in web server logs (e.g., requests to /etc/passwd, /proc/self/environ)
- Multiple failed authentication attempts followed by file read requests
Network Indicators:
- HTTP requests with path traversal sequences (e.g., ../) to the IDWeb application from unauthenticated sources
SIEM Query:
source="web_server_logs" AND (url="*../*" OR url="*/etc/*" OR url="*/proc/*") AND status=200