CVE-2017-18173 : Security Advisory and Response

Android verified boot signature misuse leads to an integer underflow in Snapdragon Mobile models.

Understanding CVE-2017-18173

If an android verified boot signature that is invalid and has an extremely long length is used, an integer underflow will happen in Snapdragon Mobile on various models.

What is CVE-2017-18173?

This CVE describes an issue where an integer underflow occurs in Snapdragon Mobile devices due to the misuse of an invalid android verified boot signature with excessive length.

The Impact of CVE-2017-18173

The vulnerability affects multiple Snapdragon Mobile models, potentially leading to security breaches and unauthorized access.

Technical Details of CVE-2017-18173

Android verified boot signature misuse results in an integer underflow in Snapdragon Mobile devices.

Vulnerability Description

An integer underflow is triggered by utilizing an invalid android verified boot signature with an exceptionally long length.

Affected Systems and Versions

The following Snapdragon Mobile models are impacted:

SD 425
SD 427
SD 430
SD 435
SD 450
SD 625
SD 810
SD 820
SD 835
SDM630
SDM636
SDM660
Snapdragon_High_Med_2016

Exploitation Mechanism

Misusing an android verified boot signature with an excessively long length causes the integer underflow in the affected Snapdragon Mobile models.

Mitigation and Prevention

Immediate action and long-term security practices are crucial to address CVE-2017-18173.

Immediate Steps to Take

Apply security patches promptly to mitigate the vulnerability.
Monitor for any unauthorized access or unusual system behavior.

Long-Term Security Practices

Regularly update firmware and software to prevent security loopholes.
Implement secure boot mechanisms and encryption protocols.

Patching and Updates

Ensure all affected devices are updated with the latest firmware and security patches to prevent exploitation of the vulnerability.