CVE-2024-48788 Overview
CVE-2024-48788 is an information disclosure vulnerability affecting the YESCAM application (com.yescom.YesCam.zwave) version 1.0.2. The vulnerability exists in the firmware update process and allows remote attackers to obtain sensitive information through insecure communication channels. This flaw is classified under CWE-319: Cleartext Transmission of Sensitive Information.
Critical Impact
Remote attackers can intercept sensitive information during the firmware update process, potentially exposing credentials, configuration data, or proprietary firmware components without requiring authentication.
Affected Products
- YESCAM (com.yescom.YesCam.zwave) version 1.0.2
- YESCAM Z-Wave enabled IoT camera devices
Discovery Timeline
- October 11, 2024 - CVE-2024-48788 published to NVD
- October 15, 2024 - Last updated in NVD database
Technical Details for CVE-2024-48788
Vulnerability Analysis
This vulnerability stems from improper handling of sensitive data during the firmware update process in the YESCAM IoT camera application. The application fails to implement proper encryption or secure transport mechanisms when downloading firmware updates, allowing attackers positioned on the network path to intercept transmitted data.
The vulnerability is particularly concerning for IoT devices as firmware often contains hardcoded credentials, cryptographic keys, and proprietary algorithms. An attacker exploiting this flaw could gain access to sensitive device configurations, authentication tokens, or use the exposed firmware to identify additional vulnerabilities for chaining attacks.
The network-based attack vector means any attacker with the ability to intercept network traffic between the YESCAM device and its update server can exploit this vulnerability without any user interaction or authentication requirements.
Root Cause
The root cause is the cleartext transmission of sensitive information (CWE-319) during firmware update operations. The YESCAM application version 1.0.2 does not enforce encrypted communication channels (such as HTTPS/TLS) when retrieving firmware updates, leaving the data exposed to network-based interception attacks.
Attack Vector
The attack can be executed remotely over the network. An attacker can perform a man-in-the-middle (MITM) attack or passively sniff network traffic to capture firmware update data. This could be accomplished through:
- ARP spoofing on the local network segment
- DNS hijacking to redirect firmware update requests
- Compromising network infrastructure between the device and update server
- Passive monitoring on shared network segments
The vulnerability allows information disclosure through the firmware update channel, enabling attackers to extract sensitive data embedded within firmware packages including configuration parameters, hardcoded credentials, and proprietary code.
Detection Methods for CVE-2024-48788
Indicators of Compromise
- Unusual network traffic from YESCAM devices over unencrypted HTTP protocols
- Firmware download requests to unexpected or non-legitimate servers
- Network captures showing cleartext transmission of firmware packages
- Unexpected firmware versions installed on YESCAM devices
Detection Strategies
- Monitor network traffic for YESCAM devices initiating unencrypted HTTP connections for firmware updates
- Implement network segmentation and traffic analysis for IoT devices to detect anomalous communication patterns
- Deploy intrusion detection systems (IDS) with rules to identify cleartext firmware transmission
- Audit DNS queries from YESCAM devices to detect potential hijacking attempts
Monitoring Recommendations
- Implement network traffic monitoring for all IoT devices including YESCAM cameras
- Enable logging of all outbound connections from IoT device network segments
- Configure alerts for firmware update activity occurring outside maintenance windows
- Monitor for indicators of MITM attacks such as ARP spoofing on network segments containing vulnerable devices
How to Mitigate CVE-2024-48788
Immediate Actions Required
- Isolate YESCAM devices on a dedicated network segment with restricted internet access
- Implement network-level encryption (VPN/IPsec) for IoT device traffic until a vendor patch is available
- Disable automatic firmware updates and perform manual updates only through verified secure channels
- Monitor vendor communications for security patches addressing this vulnerability
Patch Information
At the time of publication, no vendor patch information is available. Users should monitor the Yescam Official Site for security updates and patch announcements. Additional technical details about this vulnerability can be found in the GitHub Firmware Leakage Report.
Workarounds
- Place YESCAM devices behind a firewall that blocks outbound HTTP connections and only permits HTTPS traffic
- Implement network-level TLS inspection and enforcement for IoT device segments
- Use a VPN or encrypted tunnel for all IoT device network traffic
- Consider replacing vulnerable devices with alternatives that implement secure firmware update mechanisms
# Example: Network isolation using iptables to block unencrypted firmware updates
# Block outbound HTTP (port 80) from YESCAM devices while allowing HTTPS
iptables -A FORWARD -s 192.168.10.0/24 -p tcp --dport 80 -j DROP
iptables -A FORWARD -s 192.168.10.0/24 -p tcp --dport 443 -j ACCEPT
# Log blocked attempts for monitoring
iptables -A FORWARD -s 192.168.10.0/24 -p tcp --dport 80 -j LOG --log-prefix "YESCAM-HTTP-BLOCKED: "
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
