CVE-2018-8274 in Edge
Summary
by MITRE
A remote code execution vulnerability exists when Microsoft Edge improperly accesses objects in memory, aka "Microsoft Edge Memory Corruption Vulnerability." This affects Microsoft Edge. This CVE ID is unique from CVE-2018-8125, CVE-2018-8262, CVE-2018-8275, CVE-2018-8279, CVE-2018-8301.
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Analysis
by VulDB Data Team • 04/05/2023
The vulnerability identified as CVE-2018-8274 represents a critical memory corruption flaw within Microsoft Edge browser that enables remote code execution under specific conditions. This vulnerability manifests when the browser's rendering engine fails to properly validate memory object access operations, creating potential entry points for malicious actors to execute arbitrary code on affected systems. The issue specifically impacts Microsoft Edge versions prior to the security updates released in August 2018, making it particularly concerning given Edge's widespread adoption across enterprise and consumer environments. The vulnerability's classification as a memory corruption issue aligns with CWE-125, which describes out-of-bounds read conditions that can lead to unpredictable behavior and potential exploitation.
The technical exploitation of this vulnerability occurs through carefully crafted web content that triggers improper memory handling within Edge's JavaScript engine or rendering components. Attackers can construct malicious web pages that, when loaded in Edge, cause the browser to access memory locations outside of intended boundaries. This memory corruption can lead to overwrite critical program variables, function pointers, or control structures, ultimately allowing attackers to redirect execution flow and inject malicious code. The flaw typically requires user interaction through visiting a compromised website or clicking on malicious links, making it particularly dangerous in phishing campaigns or drive-by download scenarios.
From an operational perspective, the impact of CVE-2018-8274 extends beyond simple browser compromise, as successful exploitation can lead to complete system takeover. The vulnerability can be leveraged to escalate privileges, install persistent backdoors, or establish command and control channels without requiring local system access. Organizations running affected Edge versions face significant risk of data breaches, credential theft, and lateral movement within their networks. The vulnerability's remote execution capability makes it particularly attractive to threat actors, as it eliminates the need for physical access or local system compromise. This vulnerability directly maps to several ATT&CK techniques including T1059 for command and script interpreter execution and T1070 for indicator removal on host, as attackers often use such vulnerabilities to establish persistent presence.
Mitigation strategies for CVE-2018-8274 primarily focus on immediate patch deployment and browser hardening measures. Microsoft released security updates in August 2018 that addressed this vulnerability through improved memory access validation and enhanced bounds checking mechanisms. Organizations should prioritize applying these patches across all Edge installations, particularly in enterprise environments where the browser is extensively used. Additional protective measures include implementing strict web content filtering, disabling unnecessary browser features, and deploying sandboxing technologies that limit the potential impact of successful exploitation attempts. Network-based defenses such as web application firewalls and intrusion detection systems can help detect and block malicious traffic associated with exploitation attempts. Security monitoring should focus on unusual browser behavior, unexpected memory access patterns, and suspicious network connections that may indicate exploitation activity. The vulnerability serves as a reminder of the critical importance of maintaining up-to-date browser security patches and implementing layered defense strategies to protect against sophisticated browser-based attacks.