CVE-2018-8370 in Edge
Summary
by MITRE
A information disclosure vulnerability exists when WebAudio Library improperly handles audio requests, aka "Microsoft Edge Information Disclosure Vulnerability." This affects Microsoft Edge.
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Analysis
by VulDB Data Team • 05/02/2023
The CVE-2018-8370 vulnerability represents a critical information disclosure flaw within Microsoft Edge's WebAudio Library implementation that exposes sensitive data through improper handling of audio requests. This vulnerability specifically targets the browser's audio processing capabilities and demonstrates how seemingly benign web audio functionality can be exploited to reveal confidential information. The issue stems from inadequate validation and sanitization of audio data requests within the WebAudio API implementation, creating a pathway for malicious actors to access system resources or user data that should remain protected.
The technical flaw manifests in the WebAudio Library's failure to properly validate audio request parameters and data structures when processing audio streams. When Edge processes certain audio requests through the WebAudio API, the library does not adequately sanitize input data or enforce proper access controls, allowing for potential information leakage through memory corruption or data exposure mechanisms. This vulnerability falls under the CWE-200 category of "Information Exposure" and represents a classic example of how audio processing components can become attack vectors. The flaw enables attackers to potentially extract memory contents, system information, or other sensitive data through crafted audio requests that exploit the improper handling of audio data within the browser's audio processing pipeline.
The operational impact of CVE-2018-8370 extends beyond simple information disclosure, as it can potentially enable more sophisticated attacks within the browser environment. Attackers could leverage this vulnerability to gather system information, memory dumps, or other sensitive data that could aid in further exploitation attempts. The vulnerability affects Microsoft Edge specifically, making it particularly concerning for users who rely on this browser for web browsing activities. This information disclosure could potentially be chained with other vulnerabilities to create more severe attack scenarios, as the leaked information might provide insights into system memory layout, browser internals, or user session data. The vulnerability's exploitation requires minimal privileges and can be executed through standard web browsing activities, making it particularly dangerous for widespread exploitation.
Mitigation strategies for CVE-2018-8370 should focus on immediate patch deployment and browser security hardening measures. Microsoft released security updates to address this vulnerability in affected Edge versions, and users should ensure they have installed the latest security patches. Organizations should implement network monitoring to detect suspicious audio request patterns and consider browser security policies that limit audio processing capabilities where possible. The vulnerability aligns with ATT&CK technique T1059.007 for "Command and Scripting Interpreter: JavaScript' and represents a pathway for information gathering that could support later stages of attack chains. Additional mitigations include disabling unnecessary audio features, implementing web application firewalls, and conducting regular security assessments of web applications that utilize WebAudio APIs. Security teams should also monitor for indicators of compromise related to audio request anomalies and maintain updated threat intelligence regarding similar vulnerabilities in web audio processing components.