Versa Director GUI Dangerous File Upload Vulnerability Leading to Remote Code Execution (CVE-2024-39717)
Executive & SecOps Summary
SECOPS ASSESSMENTAuthenticated Versa Director systems with Provider-Data-Center-Admin or Provider-Data-Center-System-Admin privileges
Authenticated attackers can exploit the 'Change Favicon' feature to upload malicious files masquerading as .png images, leading to arbitrary code execution on the host system
Apply the official security patches from Versa Networks immediately and restrict access to the management GUI to trusted IP addresses only
Affected Products & Version Scope
Remediation & Live Workaround Commands
PATCH & WORKAROUND1. Official Patch & Version Upgrade Commands
Refer to the official Versa Networks security bulletin to identify the appropriate patched version for your deployment and perform the upgrade.
# Example command to upgrade Versa Director software via CLI
# (Adjust commands based on your specific Versa CLI environment)
cli> request system software upgrade image versa-director-latest.bin
cli> request system services restart web-gui2. Temporary Workaround & Hardening Configuration
If immediate patching is not feasible, restrict access to the Versa Director GUI port (typically TCP 443) using firewall rules to allow only authorized administrator IP addresses.
# Restrict access to the GUI port using iptables
# Replace '192.168.10.0/24' with your trusted management subnet
iptables -A INPUT -p tcp -s 192.168.10.0/24 --dport 443 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP3. Log Audit & IoC Verification Commands
Inspect the uploaded files in the customization directory to ensure they are legitimate image files and audit the web server logs for suspicious activity.
# Verify that files in the upload directory are genuine PNG images
find /var/versa/plots/ -type f -name '*.png' -exec file {} \; | grep -v 'PNG image data'
# Search GUI logs for favicon modification requests
grep -i 'favicon' /var/log/versa/versa-director-gui.logStop Exposing VPN Ports to the Internet — Switch to Zero-Trust Access
Eliminate public-facing VPN concentrators and firewall management ports with identity-first Zero-Trust Network Access.
Technical Root Cause & Exploitation Mechanics
1. Vulnerability Overview & Root Cause
This vulnerability (CVE-2024-39717) is a dangerous file upload vulnerability (CWE-434) residing in the 'Change Favicon' customization feature of the Versa Director GUI. The root cause is the lack of strict server-side validation of the uploaded file's content (MIME type and magic bytes), allowing files with a '.png' extension to bypass basic extension checks even if they contain executable code.
2. Exploitation Mechanics & Attack Scenario
To exploit this vulnerability, an attacker must first authenticate with high-level administrative privileges, specifically 'Provider-Data-Center-Admin' or 'Provider-Data-Center-System-Admin'. Once authenticated, the attacker uses the GUI's favicon customization endpoint to upload a malicious script (such as a web shell) disguised with a '.png' extension. The server stores the file, and if the web server configuration allows execution within that directory, the attacker can trigger the script to execute arbitrary commands with the privileges of the web server process. This vulnerability has been actively exploited in the wild and is listed in the CISA KEV catalog.
3. Infrastructure & Business Impact
Versa Director serves as a critical orchestration and management platform for SD-WAN and virtualized network infrastructures. A successful compromise of this system grants attackers high-privilege access to the core management plane, enabling lateral movement across multiple tenant networks and customer environments, potentially leading to massive data breaches and widespread operational disruption.
Official Vendor Advisories & References
The Versa Director GUI provides an option to customize the look and feel of the user interface. This option is only available for a user logged with Provider-Data-Center-Admin or Provider-Data-Center-System-Admin. (Tenant level users do not have this privilege). The “Change Favicon” (Favorite Icon) option can be mis-used to upload a malicious file ending with .png extension to masquerade as image file. This is possible only after a user with Provider-Data-Center-Admin or Provider-Data-Center-System-Admin has successfully authenticated and logged in.
Frequently Asked SecOps Questions (CVE-2024-39717)
FAQQ1. How critical is CVE-2024-39717 and is it actively exploited in the wild?
CVE-2024-39717 is rated CVSS 7.2 (HIGH) with a 30-day EPSS exploitation probability of 4.0%. It is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, requiring immediate emergency remediation.
Q2. Which vendors and products are affected by CVE-2024-39717?
Primary impacted vendors include versa-networks across versa-director. Scope summary: All unpatched Versa Director versions supporting the GUI customization feature (requires high-level administrative privileges)
Q3. What temporary mitigations or workarounds exist for CVE-2024-39717 before patching?
[Mitigation] Apply the official security patches from Versa Networks immediately and restrict access to the management GUI to trusted IP addresses only Follow the CLI remediation commands and interactive SecOps checklist on this page to restrict exposure prior to your maintenance window.
Generate an Internal Engineering Notice or CISO Report for CVE-2024-39717
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