CVE-2017-0766 in Android
Summary
by MITRE
A remote code execution vulnerability in the Android media framework (libjhead). 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. Android ID: A-37776688.
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Analysis
by VulDB Data Team • 01/11/2021
The vulnerability identified as CVE-2017-0766 represents a critical remote code execution flaw within the Android media framework, specifically affecting the libjhead library component. This vulnerability resides in the Android operating system's handling of jpeg image files and demonstrates how media processing libraries can become attack vectors for sophisticated exploitation. The affected versions span across multiple Android releases including the widely deployed android 4.4.4 through 7.1.2, indicating a substantial attack surface that would impact millions of devices globally.
The technical nature of this vulnerability stems from improper input validation within the jpeg header parsing functionality of libjhead. When the Android media framework processes specially crafted jpeg files, the library fails to properly validate the structure and content of jpeg headers, leading to memory corruption conditions that can be exploited to execute arbitrary code. This flaw operates at the kernel level within the media processing subsystem, allowing attackers to bypass standard application sandboxing mechanisms. The vulnerability manifests through heap-based buffer overflows that occur during the parsing of malformed jpeg metadata, creating opportunities for attackers to manipulate memory layout and inject malicious code execution sequences.
The operational impact of CVE-2017-0766 extends beyond simple remote code execution capabilities to encompass full device compromise potential. Attackers can leverage this vulnerability through various delivery mechanisms including malicious email attachments, compromised websites, or infected file sharing platforms. The vulnerability's classification under CWE-121 heap-based buffer overflow aligns with established patterns of memory corruption exploits that have been extensively documented in the cybersecurity community. This vulnerability directly maps to attack techniques described in the MITRE ATT&CK framework under the T1059.007 sub-technique for command and scripting interpreter, as successful exploitation enables attackers to execute arbitrary commands on affected devices. The remote nature of the vulnerability means that no physical access is required for exploitation, making it particularly dangerous for enterprise environments where mobile devices handle sensitive corporate data.
Mitigation strategies for this vulnerability require immediate patching of affected Android versions, with Google releasing security updates through the regular Android security bulletins. Organizations should implement network-based filtering to block suspicious jpeg file attachments and deploy mobile device management solutions to ensure timely security patch deployment. The vulnerability highlights the importance of secure coding practices in media processing libraries and demonstrates the need for comprehensive input validation across all system components. Security professionals should monitor for exploitation attempts through network traffic analysis and implement robust device monitoring to detect potential compromise indicators. The vulnerability also underscores the necessity of regular security assessments of third-party libraries and components within mobile operating systems, particularly those handling multimedia content processing. Organizations must prioritize patch management procedures to maintain defense-in-depth strategies against similar vulnerabilities that may arise in other media processing components.