CVE-2022-27607 in Bento4
Summary
by MITRE • 03/22/2022
Bento4 1.6.0-639 has a heap-based buffer over-read in the AP4_HvccAtom class, a different issue than CVE-2018-14531.
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Analysis
by VulDB Data Team • 03/25/2022
The vulnerability identified as CVE-2022-27607 affects Bento4 version 1.6.0-639 and represents a heap-based buffer over-read condition within the AP4_HvccAtom class. This flaw constitutes a distinct issue from CVE-2018-14531, indicating that while both vulnerabilities involve buffer handling problems, they manifest in different code components and present unique exploitation vectors. The AP4_HvccAtom class is responsible for handling HEVC (H.265) codec metadata within the Bento4 framework, which is commonly used for media processing and packaging in streaming applications. The buffer over-read occurs when the application processes malformed or maliciously crafted HEVC atom structures that exceed expected memory boundaries during parsing operations.
The technical nature of this vulnerability stems from inadequate input validation and boundary checking within the AP4_HvccAtom class implementation. When processing HEVC codec data, the application fails to properly validate the size or structure of incoming atom data before attempting to read from heap-allocated memory regions. This allows an attacker to craft specially formatted media files that trigger memory access violations when the parser attempts to read beyond allocated buffer boundaries. The heap-based nature of the over-read indicates that the vulnerability occurs in dynamically allocated memory space, potentially leading to information disclosure, application instability, or more severe exploitation outcomes depending on the execution environment.
From an operational perspective, this vulnerability poses significant risks to media processing systems that utilize Bento4 for handling HEVC content. Attackers could potentially exploit this flaw by delivering maliciously crafted media files that, when processed by vulnerable applications, cause the application to read unauthorized memory regions. This could result in information leakage from the application's memory space, including sensitive data such as cryptographic keys, user credentials, or proprietary information. The impact extends beyond simple denial of service scenarios, as the over-read could potentially be leveraged to achieve arbitrary code execution or information disclosure depending on the specific implementation details and memory layout of the target system. The vulnerability affects systems where Bento4 is used for media file processing, packaging, or streaming applications that handle HEVC content.
Mitigation strategies for CVE-2022-27607 should prioritize immediate patching of affected Bento4 installations to version 1.6.0-640 or later, which contains the necessary fixes for the buffer over-read condition. Organizations should implement comprehensive input validation measures for all media files processed through Bento4, including strict size and structure validation before parsing operations. Network-based defenses can include media file scanning and sanitization processes that detect and reject potentially malicious HEVC content before it reaches vulnerable applications. The vulnerability aligns with CWE-125, which describes out-of-bounds read conditions in software implementations, and may map to ATT&CK technique T1203, which covers exploitation of software vulnerabilities through buffer overflows. System administrators should also consider implementing memory protection mechanisms such as address space layout randomization and stack canaries to mitigate potential exploitation attempts, while monitoring for anomalous behavior in media processing systems that could indicate exploitation attempts.