CVE-2017-0205 in Edge
Summary
by MITRE
A remote code execution vulnerability exists when Microsoft Edge improperly accesses objects in memory. The vulnerability could corrupt memory in such a way that enables an attacker to execute arbitrary code in the context of the current user, aka "Microsoft Edge Memory Corruption Vulnerability."
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Analysis
by VulDB Data Team • 11/28/2022
The vulnerability identified as CVE-2017-0205 represents a critical memory corruption flaw within Microsoft Edge web browser that exposes users to remote code execution attacks. This vulnerability stems from improper handling of objects in memory during the browser's rendering and execution processes, creating a pathway for malicious actors to exploit the system's memory management mechanisms. The flaw specifically affects the way Edge processes certain web content, particularly when dealing with complex object interactions that can lead to memory corruption states.
The technical nature of this vulnerability aligns with CWE-121, which describes heap-based buffer overflow conditions, and CWE-125, which covers out-of-bounds read scenarios. The memory corruption occurs when Edge fails to properly validate object references during JavaScript execution or DOM manipulation operations, allowing attackers to manipulate memory pointers and execute malicious code with the privileges of the currently logged-in user. This type of vulnerability falls under the ATT&CK technique T1059.007 for Command and Scripting Interpreter: JavaScript, as it leverages JavaScript execution contexts to deliver the malicious payload.
The operational impact of this vulnerability is severe as it enables attackers to gain persistent access to affected systems without requiring user interaction beyond visiting a malicious website. Once exploited, the attacker can execute arbitrary code with the same privileges as the Edge browser process, potentially leading to full system compromise. The vulnerability affects multiple versions of Microsoft Edge across different Windows operating systems, making it particularly dangerous in enterprise environments where Edge is commonly used as the default browser. The remote nature of the exploit means that attackers can target users from anywhere on the internet, making it a prime candidate for widespread exploitation campaigns.
Mitigation strategies for CVE-2017-0205 should include immediate deployment of Microsoft's security patches and updates, which address the underlying memory handling issues in Edge's JavaScript engine. Organizations should implement additional security measures such as enabling Enhanced Protected Mode in Edge, which provides additional memory protection mechanisms. Network-level defenses including web application firewalls and content filtering systems can help detect and block malicious content before it reaches users. Browser hardening techniques such as disabling unnecessary JavaScript features and implementing strict Content Security Policies can further reduce the attack surface. Regular security assessments and vulnerability scanning should be conducted to identify any potential exploitation attempts, while user education regarding safe browsing practices remains essential in reducing the risk of successful exploitation.