CVE-2018-8457 in Edge
Summary
by MITRE
A remote code execution vulnerability exists in the way the scripting engine handles objects in memory in Microsoft browsers, aka "Scripting Engine Memory Corruption Vulnerability." This affects Internet Explorer 11, Microsoft Edge, Internet Explorer 10. This CVE ID is unique from CVE-2018-8354, CVE-2018-8391, CVE-2018-8456, CVE-2018-8459.
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Analysis
by VulDB Data Team • 05/08/2023
This vulnerability represents a critical memory corruption flaw within Microsoft's scripting engine that affects multiple browser implementations including Internet Explorer 11 and Microsoft Edge. The issue stems from improper handling of objects in memory during script execution, creating a pathway for remote code execution attacks. The vulnerability specifically targets the JavaScript scripting engine's memory management mechanisms, where objects are not properly validated or sanitized before being processed in memory. This allows attackers to manipulate memory structures and execute arbitrary code on affected systems. The flaw exists in the way the engine manages object references and memory allocation, creating potential for exploitation through specially crafted web content.
The technical nature of this vulnerability aligns with CWE-125, which describes out-of-bounds read conditions in memory management, and CWE-787, which covers out-of-bounds write operations. These weaknesses create opportunities for attackers to manipulate memory contents and gain unauthorized code execution privileges. The vulnerability operates at a fundamental level within the browser's scripting engine, making it particularly dangerous as it can be exploited through standard web browsing activities without requiring user interaction beyond visiting a malicious website. The attack vector typically involves loading malicious JavaScript code that triggers the memory corruption through improper object handling, potentially leading to complete system compromise.
From an operational impact perspective, this vulnerability affects organizations using Microsoft browsers as it provides attackers with a reliable method for remote code execution. The exploitability of this flaw means that security incidents could occur without any user interaction, making it particularly concerning for enterprise environments. The vulnerability's presence in both Internet Explorer 10 and Internet Explorer 11 creates a wide attack surface, as these browsers were widely deployed across corporate networks. Organizations may experience unauthorized access to sensitive data, system compromise, and potential lateral movement within their network infrastructure. The remote nature of the exploit eliminates the need for physical access or specialized attack vectors, making it an attractive target for threat actors.
Mitigation strategies should focus on immediate patch deployment through Microsoft's security updates, which address the memory corruption issues within the scripting engine. Organizations should implement browser hardening measures including disabling unnecessary scripting features and implementing content security policies to limit potential exploitation. Network-based protections such as web application firewalls and intrusion detection systems can help identify and block malicious traffic targeting this vulnerability. Security teams should also consider implementing monitoring for unusual memory access patterns and anomalous script execution behaviors. The remediation process should include comprehensive testing of patches in controlled environments before widespread deployment to ensure compatibility with existing applications. Additionally, user education regarding safe browsing practices and the importance of keeping systems updated remains crucial in defending against this class of vulnerability.