CVE-2024-40711 Overview
A deserialization of untrusted data vulnerability with a malicious payload can allow an unauthenticated remote code execution (RCE).
Critical Impact
This vulnerability allows remote attackers to execute arbitrary code on affected systems, potentially leading to complete system compromise and unauthorized data access.
Affected Products
- Veeam Veeam Backup & Replication
Discovery Timeline
- 2024-09-07 - CVE CVE-2024-40711 published to NVD
- 2025-10-30 - Last updated in NVD database
Technical Details for CVE-2024-40711
Vulnerability Analysis
The deserialization vulnerability is located in the Veeam Backup & Replication software, affecting its ability to handle serialized objects securely. When untrusted data is deserialized, it allows remote code execution without authentication.
Root Cause
The issue arises from improperly handling serialized input, leading to execution of code embedded within a malicious payload.
Attack Vector
The attack vector is over the network, exploiting the vulnerability by sending crafted serialized objects to the target.
# Example exploitation code (sanitized)
import socket
payload = b'\\xac\\xed\\x00\\x05...' # Serialized RCE payload
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(('target_ip', target_port))
s.send(payload)
s.close()
Detection Methods for CVE-2024-40711
Indicators of Compromise
- Unusual network traffic to Veeam services
- Unexpected process activity
- Changes in configuration files or unauthorized system modifications
Detection Strategies
Utilize network monitoring tools to identify suspicious serialized data being transmitted to Veeam services. Employ behavioral analysis to detect patterns consistent with deserialization attacks.
Monitoring Recommendations
Implement SIEM solutions to collect and analyze logs from Veeam services, focusing on irregular deserialization activities and RCE attempts.
How to Mitigate CVE-2024-40711
Immediate Actions Required
- Block network access to the vulnerable service using firewall rules
- Enforce strict input validation to prevent deserialization of untrusted data
- Monitor logs for signs of attempted exploitation
Patch Information
Veeam has released a security patch as noted in their advisory here. Applying this patch is critical to mitigate the vulnerability.
Workarounds
Consider disabling deserialization of untrusted data in the Veeam service if possible, or sandboxing the execution environment.
# Configuration example
echo 'Limit network access to Veeam service' >> /etc/network/firewall.conf
service firewall restart
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
