CVE-2017-13319 in Android
Summary
by MITRE • 11/27/2024
In pvmp3_get_main_data_size of pvmp3_get_main_data_size.cpp, there is a possible buffer overread due to a missing bounds check. This could lead to remote information disclosure of global static variables with no additional execution privileges needed. User interaction is not needed for exploitation.
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Analysis
by VulDB Data Team • 12/19/2024
The vulnerability identified as CVE-2017-13319 resides within the pvmp3_get_main_data_size function of the pvmp3_get_main_data_size.cpp source file, representing a critical buffer overread condition that stems from inadequate bounds checking mechanisms. This flaw manifests as a missing validation check that should have prevented access beyond the allocated memory boundaries during audio processing operations. The vulnerability specifically affects the handling of main data size calculations within the MP3 decoding framework, where insufficient input validation allows for arbitrary memory access patterns that can traverse beyond intended buffer limits.
The technical implementation of this vulnerability creates a scenario where an attacker can manipulate input data to trigger a buffer overread condition that ultimately exposes global static variables residing in the application's memory space. This type of information disclosure occurs without requiring any special execution privileges or user interaction, making the exploit particularly dangerous as it can be leveraged remotely without authentication or additional attack vectors. The absence of user interaction requirements aligns with ATT&CK technique T1068 which describes the exploitation of remote access vulnerabilities that can be triggered automatically.
From a security perspective, the vulnerability demonstrates a classic buffer overread pattern that falls under CWE-125 which defines "Out-of-bounds Read" conditions where programs access memory beyond the boundaries of allocated buffers. The flaw represents a fundamental failure in memory management practices where the developers did not implement proper input validation or boundary checking before processing the main data size parameters. The exposure of global static variables through this mechanism constitutes a significant information disclosure risk that could reveal sensitive system information, configuration details, or internal application state data that might aid in further exploitation attempts.
The operational impact of this vulnerability extends beyond simple information disclosure as it creates a potential foothold for more sophisticated attacks that could leverage the leaked information for privilege escalation or targeted exploitation of other system components. Attackers could potentially use the disclosed information to understand the application's memory layout, identify version information, or discover internal structures that might be used to craft more effective attacks against the system. The remote exploitability aspect means that this vulnerability could be actively targeted by threat actors without requiring physical access or user engagement, making it particularly concerning for systems that process untrusted MP3 data streams.
Mitigation strategies for CVE-2017-13319 should prioritize immediate patching of affected software implementations to address the missing bounds checking in the pvmp3_get_main_data_size function. Security teams should implement input validation controls that enforce strict boundary checking before any memory access operations are performed on user-supplied data. The solution requires comprehensive code review and implementation of proper buffer size validation mechanisms that ensure all memory access operations remain within allocated boundaries. Additionally, deployment of runtime protections such as stack canaries, address space layout randomization, and memory protection mechanisms can provide additional defense-in-depth layers against exploitation attempts. Organizations should also consider implementing network segmentation and access controls to limit exposure of systems that process external MP3 content, reducing the attack surface for potential exploitation of this vulnerability.