CVE-2022-28743 : Security Advisory and Response
Learn about CVE-2022-28743, a critical Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in Foscam R2C IP cameras, allowing remote code execution and full system access.
This article provides details about CVE-2022-28743, a Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability found in Foscam R2C IP cameras.
Understanding CVE-2022-28743
This CVE involves a critical security flaw in Foscam R2C IP cameras that could allow a remote attacker to gain full access to the camera and its underlying Linux system.
What is CVE-2022-28743?
The CVE-2022-28743 vulnerability is a Time-of-check Time-of-use (TOCTOU) Race Condition issue present in Foscam R2C IP cameras with specific firmware versions. It enables an authenticated remote attacker to execute arbitrary remote code via a malicious firmware patch.
The Impact of CVE-2022-28743
The impact of this vulnerability is severe as it grants the attacker full remote access to the IP camera and the Linux system running on it. With root permissions, the attacker can modify the camera's code, introduce backdoor access, and even compromise user privacy by accessing the live camera stream.
Technical Details of CVE-2022-28743
This section covers the technical aspects of the CVE.
Vulnerability Description
The vulnerability arises from a Time-of-check Time-of-use (TOCTOU) Race Condition within the Foscam R2C IP camera firmware. Attackers with administrator permissions can exploit this flaw to execute unauthorized remote code.
Affected Systems and Versions
Foscam R2C IP cameras running System Firmware <= 1.13.1.6 and Application Firmware <= 2.91.2.66 are impacted by this vulnerability.
Exploitation Mechanism
An authenticated remote attacker with administrator privileges can leverage this vulnerability to execute arbitrary remote code through a malicious firmware patch.
Mitigation and Prevention
To protect systems from CVE-2022-28743, immediate actions and long-term security practices are necessary.
Immediate Steps to Take
It is recommended to update the Foscam R2C IP camera firmware to the latest version provided by the vendor. Additionally, restrict network access to the camera and ensure strong access controls.
Long-Term Security Practices
Regularly monitor for security updates from the camera vendor, implement network segmentation to isolate IoT devices, and follow best practices for securing IoT devices.
Patching and Updates
Stay informed about firmware updates for the Foscam R2C IP camera and apply patches promptly to address known vulnerabilities.