CVE-2022-22892 in Jerryscript
Summary
by MITRE • 01/21/2022
There is an Assertion 'ecma_is_value_undefined (value) || ecma_is_value_null (value) || ecma_is_value_boolean (value) || ecma_is_value_number (value) || ecma_is_value_string (value) || ecma_is_value_bigint (value) || ecma_is_value_symbol (value) || ecma_is_value_object (value)' failed at jerry-core/ecma/base/ecma-helpers-value.c in Jerryscripts 3.0.0.
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Analysis
by VulDB Data Team • 01/26/2022
The vulnerability identified as CVE-2022-22892 represents a critical assertion failure within the JerryScript JavaScript engine version 3.0.0, specifically within the ecma-helpers-value.c source file. This assertion mechanism serves as a fundamental sanity check that validates the type consistency of JavaScript values during runtime execution. The failing assertion examines whether a given value conforms to one of the recognized ECMAScript value types including undefined, null, boolean, number, string, bigint, symbol, or object types. When this assertion fails, it indicates that the JavaScript engine encountered a value that does not properly match any of the expected type categories, suggesting a potential type system violation or memory corruption issue within the engine's value handling mechanisms.
The technical flaw manifests when the JerryScript engine processes JavaScript code that results in an invalid value type being passed to the assertion check. This can occur through various code execution paths where malformed input or unexpected program flow leads to a value that bypasses normal type validation procedures. The assertion failure typically results in immediate program termination or crash, as the engine cannot safely continue execution when encountering such an invalid state. This behavior creates a denial of service condition that can be exploited by malicious actors to disrupt service availability or potentially escalate to more severe security consequences depending on the execution context and attack surface.
From an operational impact perspective, this vulnerability affects systems that rely on JerryScript for JavaScript execution, particularly embedded devices, IoT applications, and any platform where JerryScript serves as the JavaScript engine. The assertion failure creates an unstable execution environment that can lead to service interruptions, application crashes, or system instability. The vulnerability is particularly concerning in embedded systems where such crashes could lead to complete system failure or compromise the integrity of the device's operation. The impact extends beyond simple service disruption as the underlying type system violation suggests potential memory corruption that could be leveraged for more sophisticated attacks.
Security mitigations for CVE-2022-22892 primarily involve upgrading to a patched version of JerryScript where the assertion failure has been addressed through proper value validation and error handling mechanisms. Organizations should implement comprehensive monitoring for any assertion failures or crashes in systems utilizing JerryScript, particularly in production environments where such failures could indicate exploitation attempts. The vulnerability aligns with CWE-611 Information Exposure Through Improper Error Handling, as the assertion failure reveals internal engine state information that could aid in further exploitation attempts. From an ATT&CK framework perspective, this vulnerability could be leveraged as part of initial access or execution phases, potentially enabling privilege escalation or lateral movement within compromised systems. System administrators should also consider implementing runtime protections and input validation measures to prevent malformed JavaScript code from reaching the vulnerable engine components.