CVE-2023-21238 : Security Advisory and Response

This CVE record was published on July 12, 2023, by Google Android. It involves a vulnerability in Android versions 11, 12, 12L, and 13. This vulnerability could potentially lead to local information disclosure without requiring additional execution privileges.

Understanding CVE-2023-21238

This section will delve into the details of CVE-2023-21238, shedding light on the nature of the vulnerability, its impact, technical aspects, and mitigation strategies.

What is CVE-2023-21238?

The vulnerability identified as CVE-2023-21238 resides in the 'visitUris' function of RemoteViews.java in Android. It stems from a confused deputy scenario, potentially causing a leakage of images between users. The primary risk associated with this vulnerability is local information disclosure, which could occur without the need for user interaction or elevated privileges.

The Impact of CVE-2023-21238

The impact of this vulnerability lies in the potential for an attacker to gain access to sensitive information stored locally on an affected system. By exploiting the confusion in the 'visitUris' function, an attacker could disclose images across user boundaries, compromising user privacy and confidentiality.

Technical Details of CVE-2023-21238

Understanding the technical aspects of CVE-2023-21238 is crucial for security professionals and system administrators to assess the risk it poses to their systems.

Vulnerability Description

The vulnerability in visitUris of RemoteViews.java facilitates a scenario where images can leak between users due to a confused deputy, leading to local information disclosure. This disclosure does not necessitate any additional execution privileges or user interaction for exploitation.

Affected Systems and Versions

Android versions 11, 12, 12L, and 13 are impacted by CVE-2023-21238. Users and administrators of devices running these versions should be vigilant and take steps to mitigate the risk posed by this vulnerability.

Exploitation Mechanism

The exploitation of this vulnerability does not require any user interaction. By leveraging the confusion in the 'visitUris' function of RemoteViews.java, an attacker could gain unauthorized access to images stored on the device, potentially compromising user privacy.

Mitigation and Prevention

Mitigating the risks associated with CVE-2023-21238 involves taking immediate actions as well as implementing long-term security measures to enhance the overall security posture of affected systems.

Immediate Steps to Take

Users and administrators are advised to stay informed about security updates from Google related to this vulnerability. Additionally, exercising caution while accessing untrusted content or applications can help reduce the likelihood of exploitation.

Long-Term Security Practices

Implementing a robust security policy that includes regular software updates, security patches, and user awareness training can significantly bolster the security of Android devices against potential vulnerabilities like CVE-2023-21238.

Patching and Updates

It is essential for users of Android versions 11, 12, 12L, and 13 to apply relevant security patches and updates released by Google promptly. Keeping the operating system and applications up to date is crucial in mitigating the risk of exploitation from known vulnerabilities like CVE-2023-21238.