CVE-2021-39648 : Security Advisory and Response
Learn about CVE-2021-39648, a critical Android kernel vulnerability leading to memory disclosure. Find mitigation steps & impacts of this security issue.
This CVE-2021-39648 article provides detailed information about a possible disclosure of kernel heap memory vulnerability in Android kernel, affecting system security.
Understanding CVE-2021-39648
This section delves into the specifics of the CVE-2021-39648 vulnerability in the Android kernel.
What is CVE-2021-39648?
The vulnerability resides in gadget_dev_desc_UDC_show of configfs.c, potentially leading to the disclosure of kernel heap memory due to a race condition. Exploiting this could result in local information disclosure, requiring System execution privileges without user interaction. The affected product is Android with the impacted version being Android kernel.
The Impact of CVE-2021-39648
The vulnerability poses a risk of local information disclosure, emphasizing the critical need for prompt mitigation.
Technical Details of CVE-2021-39648
This section elaborates on the technical aspects of the CVE-2021-39648 vulnerability.
Vulnerability Description
The vulnerability stems from a race condition in gadget_dev_desc_UDC_show of configfs.c, facilitating the leakage of kernel heap memory.
Affected Systems and Versions
- Affected Product: Android
- Affected Version: Android kernel
Exploitation Mechanism
The exploitation of this vulnerability requires local access and System execution privileges, without mandating any user interaction.
Mitigation and Prevention
Explore the steps to mitigate and prevent the CVE-2021-39648 vulnerability.
Immediate Steps to Take
- Apply security patches provided by the vendor promptly.
- Regularly monitor vendor notifications for updates related to this vulnerability.
Long-Term Security Practices
- Implement strict access control measures to limit system exposure.
- Conduct regular security audits and penetration testing to identify and address vulnerabilities proactively.
Patching and Updates
It is crucial to stay informed about security patches released by the Android vendor specifically targeting the CVE-2021-39648 vulnerability.