CVE-2020-0339 in Android
Summary
by MITRE • 10/14/2020
There is a possible out of bounds read due to a missing bounds check.Product: AndroidVersions: Android SoCAndroid ID: A-162980705
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Analysis
by VulDB Data Team • 11/19/2020
The vulnerability identified as CVE-2020-0339 represents a critical out-of-bounds read flaw within Android's system software stack, specifically affecting Android SoC implementations. This issue stems from a fundamental lack of proper bounds checking mechanisms within the affected code paths, creating a potential security risk that could be exploited by malicious actors. The vulnerability was tracked under Android ID A-162980705 and impacts the broader Android ecosystem, particularly those devices utilizing specific System-on-Chip (SoC) configurations. The flaw manifests when the system processes data without adequate validation of array or buffer boundaries, potentially allowing unauthorized memory access patterns.
From a technical perspective, this vulnerability falls under the category of memory safety issues and aligns with CWE-129, which addresses insufficient checking of the length of input data. The missing bounds check creates a scenario where an attacker could manipulate input data to cause the system to read memory locations beyond the intended buffer boundaries. This type of flaw typically occurs in low-level system components where direct memory manipulation is required, often involving kernel-level drivers or hardware abstraction layers. The vulnerability's exploitation potential is heightened by the fact that it exists within core system software components that handle critical data processing tasks.
The operational impact of CVE-2020-0339 extends beyond simple data corruption, as it could potentially enable attackers to extract sensitive information from memory locations, bypass security mechanisms, or even facilitate privilege escalation attacks. When an out-of-bounds read occurs, it may reveal confidential data such as cryptographic keys, user credentials, or system configuration details stored in adjacent memory regions. This vulnerability particularly concerns Android device manufacturers and users due to its potential to undermine the security model of the operating system. The attack surface is broad since the flaw exists within foundational system components that are integral to normal device operation, making it difficult to isolate and patch without comprehensive system updates.
Mitigation strategies for this vulnerability should prioritize timely application of security patches provided by Google and device manufacturers, as these updates typically contain the necessary bounds checking mechanisms to prevent the out-of-bounds read conditions. System administrators should implement proactive monitoring of patch deployment status across all affected devices and consider temporary security measures such as disabling specific functionalities that might trigger the vulnerable code paths. The remediation process aligns with ATT&CK framework tactic TA0005 (Defense Evasion) and technique T1566 (Phishing), as attackers may attempt to exploit this vulnerability through social engineering campaigns targeting vulnerable Android devices. Organizations should also implement memory safety testing protocols and code review processes that specifically target buffer overflow and bounds checking vulnerabilities to prevent similar issues from emerging in future system implementations.