CVE-2022-20322 in Android
Summary
by MITRE • 08/12/2022
In PackageManager, there is a possible installed package disclosure due to a missing permission check. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-13Android ID: A-187176993
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Analysis
by VulDB Data Team • 09/10/2022
The vulnerability identified as CVE-2022-20322 resides within the Android PackageManager component, representing a critical information disclosure flaw that undermines the system's permission model. This vulnerability specifically affects Android 13 and is catalogued under Android ID A-187176993, highlighting its significance within the Android security framework. The issue stems from a missing permission check within the PackageManager service, which governs the installation, management, and querying of applications on Android devices. This flaw allows unauthorized access to installed package information without requiring any additional privileges or user interaction, making it particularly concerning for mobile security.
The technical nature of this vulnerability aligns with CWE-284, which addresses improper access control mechanisms in software systems. The PackageManager service, which is responsible for maintaining the integrity and security of the application ecosystem, fails to properly validate permission levels when processing requests for installed package information. This missing validation creates an attack surface where malicious applications or processes can query and retrieve details about other installed applications on the device. The flaw operates at the system level where the PackageManager service should enforce strict access controls to prevent unauthorized information disclosure, yet it fails to do so properly. The vulnerability is classified as a local information disclosure issue, meaning that an attacker with minimal privileges can exploit it to gain insights into the device's application landscape without requiring elevated permissions or complex exploitation techniques.
The operational impact of this vulnerability extends beyond simple information gathering, as it provides attackers with valuable reconnaissance data that can be used for further exploitation. An attacker can obtain detailed information about installed packages including application names, package identifiers, and potentially other metadata that could be leveraged in subsequent attacks. This information disclosure could enable targeted malware delivery, social engineering attacks, or serve as a foundation for more sophisticated exploitation techniques. The vulnerability's classification as requiring no additional execution privileges or user interaction makes it particularly dangerous, as it can be exploited automatically without user consent or awareness. From an ATT&CK perspective, this vulnerability maps to techniques such as T1069.001 (Permission Groups Discovery) and T1082 (System Information Discovery), as it allows adversaries to gather information about installed applications and system configuration.
Mitigation strategies for this vulnerability should focus on implementing proper permission validation within the PackageManager service and ensuring that all queries for installed package information are properly authenticated. Android security updates and patches should enforce stricter access controls, requiring appropriate permissions before allowing package information retrieval. Organizations should also implement monitoring solutions that can detect anomalous package query patterns that might indicate exploitation attempts. Device manufacturers and security teams should prioritize applying the relevant Android security patches as soon as they become available, as this vulnerability represents a clear threat to user privacy and device security. The fix should ensure that only applications with appropriate permissions or system-level processes can access installed package information, thereby maintaining the integrity of Android's permission model and protecting users from unauthorized information disclosure.