CVE-2024-41107
📋 TL;DR
CVE-2024-41107 is an authentication bypass vulnerability in Apache CloudStack's SAML authentication feature. When SAML authentication is enabled, attackers can spoof SAML responses without valid signatures to impersonate SAML-enabled user accounts. This affects CloudStack environments where SAML authentication has been explicitly enabled.
💻 Affected Systems
- Apache CloudStack
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of all resources accessible by SAML-enabled user accounts, including administrative access to cloud infrastructure, virtual machines, storage, and network configurations.
Likely Case
Unauthorized access to cloud resources, data exfiltration, privilege escalation, and potential lateral movement within the cloud environment.
If Mitigated
No impact if SAML authentication is disabled or proper signature validation is enforced.
🎯 Exploit Status
Exploitation requires knowledge of SAML-enabled usernames, which could be guessed or obtained through reconnaissance.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.18.2.2, 4.19.1.0 or later
Vendor Advisory: https://cloudstack.apache.org/blog/security-release-advisory-cve-2024-41107
Restart Required: Yes
Instructions:
1. Backup your CloudStack configuration and database. 2. Download and install CloudStack version 4.18.2.2 or 4.19.1.0 from Apache repositories. 3. Restart CloudStack management server and all affected services. 4. Verify SAML authentication now properly validates signatures.
🔧 Temporary Workarounds
Disable SAML Authentication
linuxDisable the vulnerable SAML authentication feature entirely
cloudstack-setup-databases
mysql -u root -p cloud -e "UPDATE configuration SET value='false' WHERE name='saml2.enabled'"
🧯 If You Can't Patch
- Disable SAML authentication immediately by setting saml2.enabled=false in global settings
- Implement network segmentation to restrict access to CloudStack management interface only to trusted sources
🔍 How to Verify
Check if Vulnerable:
Check if SAML authentication is enabled: mysql -u root -p cloud -e "SELECT value FROM configuration WHERE name='saml2.enabled'"Check Version:
cat /etc/cloudstack-release || cloudstack-setup-databases --checkVerify Fix Applied:
Verify CloudStack version is 4.18.2.2 or 4.19.1.0+: rpm -q cloudstack-management or dpkg -l cloudstack-management📡 Detection & Monitoring
Log Indicators:
- SAML authentication attempts without valid signatures
- Multiple failed SAML login attempts followed by successful login
- User logins from unexpected IP addresses
Network Indicators:
- SAML response traffic to CloudStack without proper encryption
- Unusual SAML assertion patterns
SIEM Query:
source="cloudstack.log" AND ("SAML" AND "authentication" AND NOT "signature")🔗 References
- http://www.openwall.com/lists/oss-security/2024/07/19/1
- http://www.openwall.com/lists/oss-security/2024/07/19/2
- https://cloudstack.apache.org/blog/security-release-advisory-cve-2024-41107
- https://github.com/apache/cloudstack/issues/4519
- https://lists.apache.org/thread/5q06g8zvmhcw6w3tjr6r5prqdw6zckg3
- https://www.shapeblue.com/shapeblue-security-advisory-apache-cloudstack-cve-2024-41107
- http://www.openwall.com/lists/oss-security/2024/07/19/1
- http://www.openwall.com/lists/oss-security/2024/07/19/2
- https://cloudstack.apache.org/blog/security-release-advisory-cve-2024-41107
- https://github.com/apache/cloudstack/issues/4519
- https://lists.apache.org/thread/5q06g8zvmhcw6w3tjr6r5prqdw6zckg3
- https://www.shapeblue.com/shapeblue-security-advisory-apache-cloudstack-cve-2024-41107
