CVE-2021-0582 in Android
Summary
by MITRE • 08/17/2021
In wifi driver, there is a possible out of bounds read due to a missing bounds check. This could lead to remote information disclosure to a proximal attacker with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android SoCAndroid ID: A-187149601
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Analysis
by VulDB Data Team • 08/19/2021
The vulnerability identified as CVE-2021-0582 resides within the wifi driver component of Android operating systems, specifically affecting Android SoC implementations. This issue represents a critical security flaw that manifests through an out-of-bounds read condition, fundamentally compromising the integrity of memory access operations within the wireless networking subsystem. The vulnerability stems from the absence of proper bounds checking mechanisms within the driver code, creating an exploitable entry point for malicious actors operating in close proximity to affected devices.
The technical nature of this flaw places it squarely within the CWE-129 category of "Improper Validation of Array Index" and more specifically aligns with CWE-787 "Out-of-bounds Write" and CWE-125 "Out-of-bounds Read" classifications. The vulnerability operates at the kernel level within the wifi driver, where insufficient input validation allows an attacker to manipulate memory access patterns beyond their intended boundaries. This condition occurs when the driver processes incoming network packets or configuration data without adequate bounds verification, potentially allowing an attacker to read memory locations that should remain inaccessible to unprivileged code execution contexts.
From an operational perspective, the impact of CVE-2021-0582 extends significantly beyond typical local privilege escalation scenarios, as it enables remote information disclosure attacks that require no additional execution privileges beyond those already possessed by a nearby attacker. The vulnerability's proximity requirement places it within the ATT&CK framework's T1046 "Network Service Scanning' and T1059 'Command and Scripting Interpreter' techniques, where adversaries can leverage the flaw to extract sensitive information from memory locations. This could potentially expose encryption keys, network configuration details, user credentials, or other confidential data stored in memory regions accessible through the wifi driver interface. The lack of user interaction requirements makes this vulnerability particularly concerning as it can be exploited automatically without any targeted user engagement.
The exploitation of this vulnerability presents multiple attack vectors for adversaries positioned within wireless range of affected devices, potentially enabling them to gather intelligence about network configurations, device identifiers, or other sensitive operational data. Security researchers have identified that the flaw can be triggered through malformed wifi packets or network configuration data that bypasses normal input validation routines. The Android ID A-187149601 specifically references this vulnerability within Google's internal tracking systems, indicating the severity and widespread nature of the issue across various Android implementations. Organizations deploying affected Android devices must consider implementing network segmentation strategies and monitoring for anomalous wireless traffic patterns that could indicate exploitation attempts.
Mitigation strategies should focus on immediate firmware updates from device manufacturers, as well as network-level monitoring to detect potential exploitation attempts. The vulnerability's nature suggests that patching the underlying wifi driver code to include proper bounds checking mechanisms represents the most effective remediation approach. Additionally, network administrators should consider implementing wireless intrusion detection systems that can identify and alert on suspicious packet patterns that may indicate exploitation attempts. The security community has classified this vulnerability as high-risk due to its potential for information disclosure and the minimal privileges required for exploitation, making it a priority for immediate remediation across all affected Android implementations.