CVE-2022-26096 in libsimba
Summary
by MITRE • 04/12/2022
Null pointer dereference vulnerability in parser_ispe function in libsimba library prior to SMR Apr-2022 Release 1 allows out of bounds write by remote attacker.
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Analysis
by VulDB Data Team • 04/14/2022
The CVE-2022-26096 vulnerability represents a critical null pointer dereference flaw within the parser_ispe function of the libsimba library, affecting versions prior to the April 2022 SMR Release 1. This vulnerability falls under the CWE-476 category of Null Pointer Dereference, which occurs when an application attempts to access a memory location through a pointer that has been assigned a null value. The flaw specifically manifests in the parsing logic of the libsimba library, which is commonly used for processing structured data formats and communication protocols in various networking and system applications.
The technical implementation of this vulnerability allows a remote attacker to exploit the parser_ispe function through crafted input data that triggers a null pointer dereference condition. When the library processes malformed or specially constructed input, the parser_ispe function fails to properly validate pointer references, leading to a situation where a null pointer is dereferenced during the parsing operation. This fundamental error in pointer validation creates a pathway for the attacker to manipulate memory access patterns and potentially execute arbitrary code or cause system instability. The vulnerability specifically enables an out-of-bounds write condition, which means the attacker can write data beyond the allocated memory boundaries of the affected application, potentially corrupting adjacent memory regions or overwriting critical program structures.
From an operational impact perspective, this vulnerability poses significant risks to systems that utilize the libsimba library for processing external data inputs, particularly in networked environments where remote code execution could lead to complete system compromise. The remote exploitability aspect means that attackers do not require local access to the system, making the vulnerability particularly dangerous for applications that process data from untrusted sources such as network protocols, file uploads, or API endpoints. The out-of-bounds write capability can be leveraged to overwrite function pointers, return addresses, or other critical memory structures, potentially enabling privilege escalation or denial-of-service conditions that could affect entire network infrastructure components.
Security mitigations for CVE-2022-26096 should prioritize immediate patching of the libsimba library to the April 2022 SMR Release 1 or subsequent versions that contain the necessary fixes for the null pointer dereference issue. Organizations should implement network segmentation and access controls to limit exposure of systems utilizing the vulnerable library, while also monitoring for suspicious network traffic patterns that might indicate exploitation attempts. The ATT&CK framework categorizes this vulnerability under T1203 Suspicious Linking and T1059 Command and Scripting Interpreter, as exploitation may involve crafting malicious inputs to trigger the memory corruption and potentially establish persistent access. Additionally, implementing input validation controls and robust error handling within applications that use the libsimba library can provide defense-in-depth measures to reduce the likelihood of successful exploitation attempts.