CVE-2022-42512 in Android
Summary
by MITRE • 12/16/2022
In VsimOperationDataExt::encode of vsimdata.cpp, there is a possible out of bounds read due to a missing bounds check. This could lead to local information disclosure with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-241763050References: N/A
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Analysis
by VulDB Data Team • 04/18/2025
The vulnerability identified as CVE-2022-42512 represents a critical out-of-bounds read flaw within the Android kernel's VsimOperationDataExt::encode function located in vsimdata.cpp. This issue manifests as a missing bounds check that allows malicious actors to potentially access memory regions beyond the allocated buffer boundaries. The vulnerability specifically affects the Android kernel environment and is categorized under the Android ID A-241763050, indicating its significance within the Android security framework.
The technical implementation of this vulnerability stems from insufficient input validation within the VsimOperationDataExt::encode method which processes data operations. When the function handles data encoding without proper boundary verification, it creates an opportunity for attackers to manipulate input parameters to trigger memory access violations. This particular flaw falls under CWE-129, which specifically addresses insufficient validation of length of inputs, and more broadly aligns with CWE-125, representing out-of-bounds read conditions. The absence of proper bounds checking allows for potential information disclosure through memory corruption that can reveal sensitive system data.
The operational impact of this vulnerability is significant as it requires only system execution privileges for exploitation, making it particularly dangerous in environments where local users have elevated access rights. While user interaction is not necessary for exploitation, the requirement for system-level privileges limits the attack surface to scenarios where attackers already possess elevated access or can escalate their privileges through other means. The potential for local information disclosure means that an attacker with system execution privileges could extract confidential data from kernel memory spaces, potentially including cryptographic keys, system credentials, or other sensitive operational information.
From an adversarial perspective, this vulnerability aligns with ATT&CK technique T1059.001, which involves executing malicious code through command and scripting interpreters, and potentially T1068, which covers privilege escalation techniques. The vulnerability's exploitation path typically involves crafting specific input data that triggers the out-of-bounds read condition, allowing for memory access beyond intended boundaries. Security professionals should note that this flaw represents a potential pathway for attackers to escalate privileges or extract sensitive system information, making it a critical concern for Android kernel security.
Mitigation strategies for CVE-2022-42512 should focus on implementing comprehensive input validation and bounds checking mechanisms within the VsimOperationDataExt::encode function. The recommended approach includes adding proper boundary checks before any memory access operations, ensuring that all input parameters are validated against expected ranges and lengths. Additionally, implementing stack canaries, address space layout randomization, and other memory protection mechanisms can help prevent exploitation attempts. Organizations should prioritize applying the latest Android kernel patches and updates provided by Google, as these typically contain the necessary code modifications to address the specific bounds checking deficiencies. Regular security audits and code reviews focusing on memory management practices should also be conducted to identify and remediate similar vulnerabilities in other kernel components.