CVE-2022-26099 in libsimba
Summary
by MITRE • 04/12/2022
Null pointer dereference vulnerability in parser_infe function of libsimba library prior to SMR Apr-2022 Release 1 allows out of bounds read by remote attackers.
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Analysis
by VulDB Data Team • 04/14/2022
The CVE-2022-26099 vulnerability represents a critical null pointer dereference flaw within the libsimba library's parser_infe function, affecting versions prior to the April 2022 SMR Release 1. This vulnerability resides in the parsing logic of a library that processes structured data, creating a pathway for remote attackers to execute out-of-bounds read operations. The issue stems from inadequate input validation and error handling within the parser component, specifically when processing malformed or unexpected data sequences that trigger the null pointer dereference condition.
The technical implementation of this vulnerability demonstrates a classic buffer over-read scenario where the parser_infe function fails to properly validate pointer references before dereferencing them. When remote attackers send specially crafted input data to systems utilizing the vulnerable libsimba library, the parser attempts to access memory locations through null pointers, resulting in unauthorized data reads beyond the intended buffer boundaries. This behavior aligns with CWE-476 which specifically addresses null pointer dereference vulnerabilities, and represents a direct violation of proper memory management practices. The out-of-bounds read operation can potentially expose sensitive information from adjacent memory locations, including stack contents, heap data, or other process memory segments.
From an operational perspective, this vulnerability poses significant risks to systems that rely on the libsimba library for data processing, particularly in networked environments where remote code execution capabilities could be leveraged. Attackers can exploit this flaw without requiring authentication, making it particularly dangerous for services that process external input such as network protocols, file parsing applications, or data ingestion systems. The impact extends beyond simple information disclosure, as the out-of-bounds read may reveal memory layout information that could facilitate more sophisticated attacks such as information leakage for exploitation or bypass of security mechanisms. The vulnerability's remote attack surface means that any system running software that utilizes the affected library version is potentially exposed to this threat vector.
Mitigation strategies for CVE-2022-26099 should prioritize immediate patching of the libsimba library to the April 2022 SMR Release 1 or subsequent versions that contain the necessary fixes. Organizations should conduct comprehensive inventory assessments to identify all systems and applications that utilize the vulnerable library, implementing network segmentation and access controls to limit exposure. The fix typically involves adding proper null pointer checks and input validation within the parser_infe function to prevent the dereference of uninitialized or invalid pointers. Security teams should also implement monitoring for suspicious network traffic patterns that may indicate exploitation attempts, while ensuring that all applications using this library are regularly updated as part of standard security maintenance procedures. This vulnerability demonstrates the importance of maintaining up-to-date third-party libraries and implementing robust input validation practices throughout software development lifecycles, aligning with ATT&CK technique T1068 which addresses local privilege escalation and system compromise through software vulnerabilities.