CVE-2019-0769

Root

Cause CVE-2019-0769 is a memory corruption vulnerability in the scripting engine of Microsoft Edge. The flaw exists in the way the engine handles objects in memory, leading to potential corruption that can be exploited for remote code execution [1]. This vulnerability is part of a group of similar scripting engine memory corruption issues, including CVE-2019-0609, CVE-2019-0639, and others [1].

Exploitation

To exploit this vulnerability, an attacker would need to host a specially crafted website (or leverage a compromised site that accepts or hosts user-provided content) and convince a user to visit it using Microsoft Edge. No authentication is required, and the attacker does not need any special network position beyond serving the malicious content. The user interaction is limited to visiting the malicious page [1].

Impact

Successful exploitation allows an attacker to execute arbitrary code in the context of the current user. If the user has administrative privileges, the attacker could then install programs, view, change, or delete data, or create new accounts with full user rights. The impact is complete compromise of confidentiality, integrity, and availability on the affected system [1].

Mitigation

Microsoft released a security update for this vulnerability in April 2019. The fix addresses the memory corruption issue in the scripting engine. Users should apply the latest updates for Microsoft Edge or, for the underlying ChakraCore engine, versions 1.11.7 or later [1][2]. No workarounds were provided by Microsoft, making patching the primary mitigation.