CVE-2016-3274 in Edge
Summary
by MITRE
Microsoft Internet Explorer 9 through 11 and Microsoft Edge allow remote attackers to conduct content-spoofing attacks via a crafted URL, aka "Microsoft Browser Spoofing Vulnerability."
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Analysis
by VulDB Data Team • 09/01/2022
The Microsoft Browser Spoofing Vulnerability identified as CVE-2016-3274 represents a critical security flaw affecting Microsoft Internet Explorer versions 9 through 11 and Microsoft Edge browser implementations. This vulnerability enables remote attackers to manipulate browser behavior in ways that can deceive users into believing they are interacting with legitimate websites while actually encountering malicious content. The issue stems from how these browsers handle URL parsing and display mechanisms, creating opportunities for sophisticated social engineering attacks that can bypass traditional security controls. The vulnerability operates at the core of browser rendering and navigation systems, making it particularly dangerous as it can be exploited across multiple browser versions and platforms.
The technical implementation of this vulnerability involves manipulation of URL schemes and browser navigation behaviors that allow attackers to craft deceptive URLs which appear legitimate to users while actually directing them to malicious destinations. When users interact with these crafted URLs, the browsers' spoofing mechanisms can be exploited to display misleading content or redirect users to unintended locations without proper user consent or warning. This flaw specifically targets the browser's URL handling and display logic, potentially allowing attackers to create convincing fake websites that mimic trusted domains. The vulnerability's impact is amplified by the fact that it can be triggered through various means including email attachments, web links, or malicious advertisements that users might encounter during normal browsing activities. The flaw essentially undermines the browser's ability to properly validate and display URL information, creating a window of opportunity for attackers to conduct sophisticated content-spoofing operations.
The operational impact of CVE-2016-3274 extends beyond simple phishing attacks to encompass broader security implications including potential data theft, credential harvesting, and system compromise. Attackers can leverage this vulnerability to create convincing fake login pages that appear to be legitimate banking or social media sites, tricking users into providing sensitive information. The vulnerability also enables more sophisticated attacks such as drive-by downloads where users are automatically directed to malicious sites without explicit user interaction. Security researchers have noted that this vulnerability can be particularly effective in targeted attacks against specific organizations, as it allows attackers to craft URLs that appear to come from trusted internal sources. The attack surface is broad given that Internet Explorer versions 9 through 11 remain in use within many enterprise environments, creating widespread potential for exploitation. Organizations that have not fully transitioned to modern browser versions remain particularly vulnerable to this class of attack.
Mitigation strategies for CVE-2016-3274 require both immediate patching and operational security measures to protect against exploitation. Microsoft released security updates that addressed the underlying URL handling mechanisms in affected browser versions, and organizations should prioritize deployment of these patches across all affected systems. Network administrators should implement URL filtering and content inspection solutions that can detect and block suspicious URL patterns associated with this vulnerability. Browser hardening measures including disabling unnecessary browser features, implementing strict security policies, and configuring user access controls can reduce the attack surface. Security teams should also conduct regular vulnerability assessments to identify systems running outdated browser versions that may be susceptible to this attack. The vulnerability aligns with attack patterns documented in the attack tree methodology, particularly those involving user deception and social engineering techniques that leverage browser implementation weaknesses. Organizations should consider implementing multi-factor authentication and security awareness training to provide additional protection layers against successful exploitation attempts. This vulnerability also highlights the importance of maintaining up-to-date browser security implementations and the risks associated with legacy browser support in enterprise environments.