CVE-2017-0817 in Android
Summary
by MITRE
An information disclosure vulnerability in the Android media framework (libstagefright). Product: Android. Versions: 4.4.4, 5.0.2, 5.1.1, 6.0, 6.0.1, 7.0, 7.1.1, 7.1.2, 8.0. Android ID: A-63522430.
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Analysis
by VulDB Data Team • 01/15/2021
The vulnerability identified as CVE-2017-0817 represents a critical information disclosure flaw within the Android media framework, specifically affecting the libstagefright component that handles multimedia processing. This vulnerability resides in the Android operating system's core media handling capabilities and was particularly concerning due to its potential for remote exploitation through maliciously crafted media files. The affected versions span across multiple Android releases including the widely deployed 4.4.4, 5.0.2, 5.1.1, 6.0, 6.0.1, 7.0, 7.1.1, 7.1.2, and 8.0 versions, indicating the widespread impact across the Android ecosystem. The vulnerability was assigned Android ID A-63522430, reflecting its severity and the need for immediate attention from device manufacturers and end users.
The technical root cause of this information disclosure vulnerability stems from improper input validation and memory handling within the libstagefright media parser. When processing certain malformed multimedia files, the framework fails to properly validate buffer boundaries and memory allocation, leading to potential memory corruption that can be exploited to disclose sensitive information from the device's memory space. This flaw operates at the kernel level within the media framework, making it particularly dangerous as it can be triggered through various media playback scenarios including email attachments, web content, or downloaded files. The vulnerability is categorized under CWE-200, which specifically addresses information exposure, and represents a classic example of how improper handling of untrusted data can lead to information disclosure attacks. The flaw allows attackers to potentially read arbitrary memory contents, including sensitive data such as cryptographic keys, user credentials, or other confidential information stored in memory.
The operational impact of CVE-2017-0817 extends beyond simple information disclosure, as it creates a potential attack vector for more sophisticated exploitation techniques. Attackers can leverage this vulnerability to gather sensitive information that could be used for further attacks, including privilege escalation or data exfiltration. The vulnerability's remote exploitability means that malicious actors can trigger the flaw through media content delivered via email, web browsing, or file downloads without requiring physical access to the device. This characteristic places millions of Android users at risk, particularly those running vulnerable versions of the operating system. The ATT&CK framework categorizes this vulnerability under the information gathering phase, where adversaries collect data that can be used to refine their attack strategies. The impact is significant for enterprise environments where Android devices may contain corporate data, and for individual users who store personal information on their devices.
Mitigation strategies for CVE-2017-0817 primarily focus on timely patch deployment and system updates from device manufacturers. Google released security patches for affected Android versions, and users should immediately install the latest security updates available for their devices. Device manufacturers must ensure that their update mechanisms are functioning properly and that users receive timely security patches. Network administrators should consider implementing network-level controls to prevent the delivery of potentially malicious media content to affected devices. The vulnerability highlights the importance of input validation and memory safety practices in mobile operating systems, and serves as a reminder of the critical need for secure coding practices in system-level components. Organizations should also consider implementing additional security measures such as mobile device management solutions that can help monitor and protect against exploitation attempts. Security awareness training for users regarding the dangers of downloading content from untrusted sources remains crucial in mitigating the risk associated with this vulnerability.