CVE-2022-20605 in Android
Summary
by MITRE • 12/16/2022
In SAECOMM_CopyBufferBytes of SAECOMM_Utility.c, there is a possible out of bounds read due to an incorrect bounds check. This could lead to remote information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-231722405References: N/A
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Analysis
by VulDB Data Team • 04/23/2026
The vulnerability identified as CVE-2022-20605 resides within the SAECOMM_CopyBufferBytes function located in SAECOMM_Utility.c within the Android kernel source code. This issue represents a critical out-of-bounds read condition that stems from an improper bounds checking mechanism during buffer operations. The flaw specifically manifests when the system attempts to copy byte sequences between memory buffers, where the validation logic fails to correctly verify buffer limits before accessing memory regions. Such a condition creates a scenario where an attacker can potentially read data from memory locations beyond the intended buffer boundaries, leading to information disclosure vulnerabilities.
The technical implementation of this vulnerability demonstrates a classic buffer over-read flaw that aligns with CWE-125 - Out-of-bounds Read, which is a well-documented weakness in software security practices. The vulnerability operates at the kernel level within Android's communication subsystem, specifically affecting the SAECOMM utility functions that handle data transfer operations. The improper bounds checking mechanism fails to validate the destination buffer size against the source data length, allowing for memory access beyond allocated boundaries. This particular implementation flaw suggests that the developers may have overlooked edge case scenarios during the bounds validation process, particularly when dealing with variable-length data transfers or when buffer sizes are dynamically determined.
From an operational perspective, this vulnerability presents a significant risk as it enables remote information disclosure without requiring any additional privileges or user interaction for exploitation. The attack vector operates entirely within the kernel space, making it particularly dangerous as it can potentially access sensitive kernel memory regions containing confidential data such as cryptographic keys, system credentials, or other privileged information. The absence of user interaction requirements means that an attacker could exploit this vulnerability through network-based attacks or other remote mechanisms without needing to physically interact with the target device. This characteristic places the vulnerability in the ATT&CK matrix under the T1068 - Exploitation for Privilege Escalation and T1005 - Data from Local System categories, as it can be leveraged to extract sensitive information from the kernel memory space.
The security implications extend beyond simple information disclosure, as the leaked memory contents could potentially contain sensitive data that could be used for further exploitation attempts. Attackers might extract kernel pointers, stack contents, or other memory artifacts that could aid in bypassing security mitigations such as address space layout randomization or stack canaries. The vulnerability's classification as a remote information disclosure means that threat actors could potentially deploy automated scanning tools to identify affected devices and systematically exploit the flaw to gather intelligence. This makes the vulnerability particularly attractive to advanced persistent threat groups and automated malware campaigns that target Android devices for reconnaissance purposes. The lack of additional execution privileges required for exploitation means that even limited access to the system could be sufficient to trigger the vulnerability and extract sensitive information.
Mitigation strategies for this vulnerability should focus on implementing proper bounds checking mechanisms within the affected SAECOMM_CopyBufferBytes function. The recommended approach involves strengthening the validation logic to ensure that all buffer operations include comprehensive size validation before memory access occurs. System administrators and device manufacturers should prioritize applying the latest kernel security patches and updates that address this specific flaw. Additionally, implementing memory protection mechanisms such as stack canaries, address space layout randomization, and kernel address space layout randomization could provide additional defense-in-depth measures. The vulnerability serves as a reminder of the critical importance of rigorous code review processes and formal verification techniques in kernel-level development, particularly when handling buffer operations and memory management functions. Organizations should also consider implementing network monitoring solutions to detect potential exploitation attempts targeting this vulnerability, as well as establishing incident response procedures specifically designed to handle kernel-level information disclosure vulnerabilities.