CVE-2016-3322 in Edge
Summary
by MITRE
Microsoft Internet Explorer 11 and Edge allow remote attackers to execute arbitrary code via a crafted web page, aka "Microsoft Browser Memory Corruption Vulnerability," a different vulnerability than CVE-2016-3289.
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Analysis
by VulDB Data Team • 09/13/2022
Microsoft Internet Explorer 11 and Edge browser products contain a memory corruption vulnerability that enables remote code execution through specially crafted web pages. This vulnerability represents a critical security flaw in the browser's memory management systems where improper handling of memory allocations leads to exploitable conditions. The flaw specifically affects how these browsers process certain web content, creating opportunities for attackers to inject and execute malicious code on targeted systems. The vulnerability is classified as a memory corruption issue that falls under the broader category of heap-based buffer overflows and memory management errors.
The technical implementation of this vulnerability stems from insufficient input validation and memory handling within the browser's rendering engine. Attackers can craft malicious web pages that trigger memory corruption when the browser attempts to process specific elements or data structures. These crafted pages exploit weaknesses in how the browsers manage memory allocation and deallocation, potentially leading to arbitrary code execution with the privileges of the logged-in user. The vulnerability operates at the memory level where buffer overflows or use-after-free conditions can occur, allowing attackers to manipulate memory contents and redirect execution flow. This type of vulnerability is particularly dangerous because it can be triggered through normal web browsing activities without requiring user interaction beyond visiting a malicious website.
The operational impact of this vulnerability extends beyond simple remote code execution to encompass complete system compromise. An attacker who successfully exploits this vulnerability can gain full control over the affected system, potentially leading to data theft, system infiltration, or deployment of additional malware. The attack surface is broad as it affects multiple browser versions and operating systems, making it particularly attractive to threat actors seeking widespread exploitation. Organizations running affected browser versions face significant risk of targeted attacks, especially in environments where users browse untrusted websites or receive phishing emails containing malicious links. The vulnerability's remote nature means that attackers can exploit it from anywhere on the internet without requiring physical access to the target system.
Mitigation strategies for this vulnerability require immediate patch application from Microsoft, as the primary fix involves addressing the underlying memory handling issues in the browser's codebase. System administrators should prioritize updating all affected browser installations and implement browser hardening measures such as disabling unnecessary features, implementing content security policies, and using sandboxing techniques. Network-level protections including web application firewalls and intrusion detection systems can help detect and block exploitation attempts. Additionally, user education regarding safe browsing practices and awareness of phishing tactics remains crucial in preventing successful exploitation. The vulnerability's classification aligns with CWE-122 Heap-based Buffer Overflow and follows patterns associated with ATT&CK technique T1203 Exploitation for Client Execution. Organizations should also consider implementing browser isolation technologies and monitoring for unusual memory access patterns that might indicate exploitation attempts. Regular security assessments and vulnerability scanning should be conducted to identify any remaining exposure risks and ensure comprehensive protection against similar memory corruption vulnerabilities.