CVE-2022-24936 Explained : Impact and Mitigation
Learn about CVE-2022-24936 affecting Silicon Labs Gecko Bootloader. Find out how attackers can compromise flash keys via a malicious upgrade and steps to mitigate the risk.
This article provides detailed information on CVE-2022-24936 affecting Silicon Labs Gecko Bootloader.
Understanding CVE-2022-24936
This CVE involves an Out-of-Bounds error in GBL parser in Silicon Labs Gecko Bootloader version 4.0.1 and earlier, allowing attackers to overwrite flash Sign key and OTA decryption key via a malicious bootloader upgrade.
What is CVE-2022-24936?
The vulnerability in Silicon Labs Gecko Bootloader version 4.0.1 and earlier enables attackers to exploit an Out-of-Bounds error in the GBL parser, potentially leading to unauthorized access to critical keys through a malicious bootloader upgrade.
The Impact of CVE-2022-24936
The impact of this CVE is rated as high severity due to the potential for attackers to compromise the integrity of the flash Sign key and OTA decryption key, posing a significant risk to the affected systems.
Technical Details of CVE-2022-24936
This section provides insights into the vulnerability description, affected systems, and the exploitation mechanism.
Vulnerability Description
The vulnerability stems from an Out-of-Bounds error in the GBL parser, allowing attackers to overwrite critical flash keys through a malicious bootloader upgrade.
Affected Systems and Versions
Silicon Labs Gecko Bootloader version 4.0.1 and earlier are impacted by this vulnerability, exposing devices to potential exploitation.
Exploitation Mechanism
Attackers can exploit this vulnerability by leveraging the Out-of-Bounds error in the GBL parser to manipulate the flash Sign key and OTA decryption key via a malicious bootloader upgrade.
Mitigation and Prevention
In response to CVE-2022-24936, immediate steps along with long-term security practices and patching updates are crucial for mitigating the risks.
Immediate Steps to Take
It is recommended to apply the patches provided by Silicon Labs promptly and monitor for any unauthorized bootloader upgrades.
Long-Term Security Practices
Implementing secure boot mechanisms and regularly updating bootloader firmware can enhance the overall security posture of systems.
Patching and Updates
Regularly check for security advisories from Silicon Labs and apply relevant bootloader updates to address vulnerabilities and enhance system security.