CVE-2025-45378
📋 TL;DR
Dell CloudLink versions 8.0 through 8.1.2 have a vulnerability where privileged users with known passwords can escape the restricted shell, gaining full command shell access and escalating privileges. This affects organizations using Dell CloudLink within the vulnerable version range. Attackers can exploit this via SSH if enabled with web credentials.
💻 Affected Systems
- Dell CloudLink
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise allowing attackers to execute arbitrary commands, access sensitive data, pivot to other systems, and maintain persistent access.
Likely Case
Privilege escalation leading to unauthorized access of the CloudLink server, potential data exfiltration, and system manipulation.
If Mitigated
Limited impact if strong access controls, network segmentation, and monitoring are in place to detect unauthorized shell access attempts.
🎯 Exploit Status
Exploitation requires authenticated access with privileged credentials; CVSS 9.1 indicates high severity and ease of exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Update to version beyond 8.1.2 as per vendor advisory
Vendor Advisory: https://www.dell.com/support/kbdoc/en-us/000384363/dsa-2025-374-security-update-for-dell-cloudlink-multiple-security-vulnerabilities
Restart Required: Yes
Instructions:
1. Review the Dell advisory. 2. Backup configurations. 3. Apply the latest patch from Dell. 4. Restart the CloudLink server. 5. Verify the update.
🔧 Temporary Workarounds
Disable SSH Access
linuxDisable SSH on the CloudLink server if not required to prevent remote exploitation.
systemctl stop sshd
systemctl disable sshd
Restrict Network Access
linuxUse firewall rules to limit SSH access to trusted IP addresses only.
iptables -A INPUT -p tcp --dport 22 -s TRUSTED_IP -j ACCEPT
iptables -A INPUT -p tcp --dport 22 -j DROP
🧯 If You Can't Patch
- Implement strict access controls and monitor for unauthorized shell access attempts.
- Disable SSH or restrict it to minimal necessary users and networks.
🔍 How to Verify
Check if Vulnerable:
Check the CloudLink version via admin interface or command line; if between 8.0 and 8.1.2, it is vulnerable.Check Version:
cloudlink --version or check via web admin panelVerify Fix Applied:
Confirm the version is updated beyond 8.1.2 and test restricted shell functionality.📡 Detection & Monitoring
Log Indicators:
- Unusual SSH login attempts from privileged users
- Commands executed outside restricted shell in system logs
Network Indicators:
- SSH connections to CloudLink server from unexpected sources
SIEM Query:
source="cloudlink_logs" AND (event="shell_escape" OR ssh_login AND user="privileged_user")