CVE-2023-30699 in Smart Phone
Summary
by MITRE • 08/10/2023
Out-of-bounds write vulnerability in parser_hvcC function of libsimba library prior to SMR Aug-2023 Release 1 allows code execution by remote attackers.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 08/10/2023
The CVE-2023-30699 vulnerability represents a critical out-of-bounds write flaw within the parser_hvcC function of the libsimba library, affecting versions prior to the SMR August 2023 release. This vulnerability resides in the handling of HEVC video codec data structures, specifically within the hvcc (HEVC Video Codec Configuration) parsing functionality. The libsimba library serves as a foundational component for video processing and streaming applications, making this vulnerability particularly concerning for systems that process multimedia content from untrusted sources.
The technical flaw manifests when the parser_hvcC function processes malformed or crafted hvcc data structures without proper bounds checking on array accesses. This allows remote attackers to manipulate the parsing logic through specially crafted video content that triggers an out-of-bounds memory write operation. The vulnerability stems from insufficient input validation and memory management within the video codec parser, creating a condition where attacker-controlled data can overwrite adjacent memory locations. This type of vulnerability aligns with CWE-787, which specifically addresses out-of-bounds write conditions in software applications, and represents a classic example of memory corruption vulnerabilities that can lead to arbitrary code execution.
The operational impact of this vulnerability extends across multiple domains where libsimba is integrated, including media streaming platforms, video processing servers, and content delivery networks. Remote attackers can exploit this vulnerability by delivering malicious video content that, when parsed by affected systems, triggers the out-of-bounds write condition. The consequences include potential system compromise, denial of service, and unauthorized code execution, making this vulnerability particularly dangerous in environments where untrusted media content is processed. Attackers could leverage this flaw to escalate privileges, execute malicious payloads, or establish persistent access to vulnerable systems. This vulnerability maps directly to ATT&CK technique T1203, which covers legitimate programs that are used for exploitation, and T1059, which covers command and scripting interpreter usage for execution.
Mitigation strategies for CVE-2023-30699 require immediate patching of the libsimba library to the SMR August 2023 release or later versions that contain the necessary bounds checking fixes. Organizations should implement network segmentation and content filtering to prevent unauthorized video content from reaching systems that process media data. Input validation should be strengthened at multiple layers, including application-level sanitization of video parameters and implementation of robust error handling for codec parsing operations. Additionally, security monitoring should be enhanced to detect anomalous behavior patterns that might indicate exploitation attempts, particularly around video processing functions and memory access patterns. System administrators should conduct thorough vulnerability assessments to identify all systems utilizing the affected library version and prioritize remediation efforts accordingly.