CVE-2024-11131: Synology TC500 Firmware RCE Vulnerability

CVE-2024-11131 Overview

CVE-2024-11131 is a critical out-of-bounds read vulnerability discovered in the video interface of Synology Camera Firmware. This security flaw allows remote attackers to execute arbitrary code via unspecified vectors, potentially compromising affected surveillance camera systems without requiring authentication or user interaction.

The vulnerability affects multiple Synology camera models running firmware versions prior to 1.2.0-0525. Given the network-accessible nature of IP cameras and their deployment in security-sensitive environments, this vulnerability presents significant risk to enterprise and home security infrastructure.

Critical Impact

Remote attackers can exploit the out-of-bounds read vulnerability in the video interface to achieve arbitrary code execution on affected Synology cameras, potentially gaining full control of surveillance devices without authentication.

Affected Products

• Synology BC500 with firmware versions before 1.2.0-0525
• Synology CC400W with firmware versions before 1.2.0-0525
• Synology TC500 with firmware versions before 1.2.0-0525

Discovery Timeline

• 2025-03-19 - CVE-2024-11131 published to NVD
• 2026-01-16 - Last updated in NVD database

Technical Details for CVE-2024-11131

Vulnerability Analysis

The vulnerability resides in the video interface component of Synology Camera Firmware. An out-of-bounds read (CWE-125) occurs when the software reads data past the end of an allocated buffer. In the context of video processing, this type of vulnerability typically manifests when parsing video stream data, handling frame buffers, or processing network packets containing video content.

When successfully exploited, attackers can leverage this memory corruption condition to execute arbitrary code on the affected device. The impact is particularly severe because the vulnerability is remotely exploitable without authentication and requires no user interaction, meaning attackers can compromise vulnerable cameras directly over the network.

Root Cause

The root cause is an out-of-bounds read condition (CWE-125) in the video interface processing code. This occurs when the firmware fails to properly validate buffer boundaries before accessing memory during video stream processing operations. The lack of proper bounds checking allows an attacker to craft malicious input that causes the system to read beyond allocated memory regions.

Attack Vector

The vulnerability is exploitable remotely over the network. Attackers can send specially crafted data to the camera's video interface without requiring any prior authentication or privileges. The attack does not require user interaction, making it particularly dangerous for internet-exposed cameras or cameras accessible on compromised networks.

The exploitation typically involves:

1. Identifying a vulnerable Synology camera on the network
2. Crafting malicious packets targeting the video interface
3. Sending the payload to trigger the out-of-bounds read condition
4. Leveraging the memory corruption to achieve code execution

Due to the nature of embedded device exploitation, successful attacks could result in complete device compromise, allowing attackers to intercept video feeds, pivot to other network devices, or use the camera as a foothold for further attacks.

Detection Methods for CVE-2024-11131

Indicators of Compromise

• Unusual network traffic patterns to/from Synology camera devices on video streaming ports
• Unexpected process execution or memory anomalies on camera firmware
• Abnormal camera behavior including unexplained reboots or configuration changes
• Network connections from cameras to unknown external IP addresses

Detection Strategies

• Implement network monitoring to detect anomalous traffic targeting Synology camera devices
• Deploy intrusion detection systems with signatures for out-of-bounds read exploitation attempts against IoT devices
• Monitor firmware integrity and detect unauthorized modifications to camera systems
• Conduct regular vulnerability scans to identify cameras running firmware versions before 1.2.0-0525

Monitoring Recommendations

• Enable logging on network infrastructure to capture traffic to and from camera devices
• Segment IoT and surveillance devices on isolated network VLANs with strict access controls
• Implement network behavioral analysis to detect deviation from normal camera communication patterns
• Configure alerts for any firmware modification attempts or unauthorized access to camera management interfaces

How to Mitigate CVE-2024-11131

Immediate Actions Required

• Upgrade all affected Synology camera models (BC500, CC400W, TC500) to firmware version 1.2.0-0525 or later
• Isolate vulnerable cameras from the internet until patching is complete
• Place cameras behind firewalls with restricted access from trusted networks only
• Review camera access logs for any signs of exploitation attempts

Patch Information

Synology has released firmware version 1.2.0-0525 which addresses this vulnerability. Administrators should download and apply the update from the official Synology support channels. Detailed patch information is available in the Synology Security Advisory SA-24:24.

Workarounds

• If immediate patching is not possible, restrict network access to affected cameras using firewall rules
• Disable remote access and internet exposure for vulnerable camera models until the update can be applied
• Implement network segmentation to isolate cameras from critical infrastructure
• Enable additional authentication mechanisms at the network level to limit access to camera management interfaces