CVE-2015-0049 in Internet Explorer
Summary
by MITRE
Microsoft Internet Explorer 8 and 10 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, aka "Internet Explorer Memory Corruption Vulnerability."
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Analysis
by VulDB Data Team • 12/08/2024
This vulnerability represents a critical memory corruption flaw in Microsoft Internet Explorer versions 8 and 10 that enables remote code execution through malicious web content. The issue stems from improper handling of memory structures during web page rendering processes, creating opportunities for attackers to inject and execute arbitrary code on affected systems. The vulnerability specifically affects the browser's memory management mechanisms when processing certain web elements, leading to unpredictable memory states that can be exploited by malicious actors.
The technical nature of this flaw aligns with CWE-125, which describes out-of-bounds read conditions where programs access memory locations beyond allocated boundaries. In Internet Explorer's case, the vulnerability manifests when the browser encounters specially crafted HTML or JavaScript content that triggers improper memory allocation or deallocation sequences. Attackers can leverage this by hosting malicious web pages that, when loaded in the vulnerable browser, cause memory corruption that can be manipulated to execute arbitrary instructions with the privileges of the user running the browser.
The operational impact of CVE-2015-0049 extends beyond simple remote code execution to include potential system compromise and data theft. When exploited successfully, the vulnerability allows attackers to gain full control over affected systems, potentially leading to complete system compromise. The memory corruption can also result in denial of service conditions where the browser crashes or becomes unstable, disrupting user productivity and potentially providing a vector for more sophisticated attacks. This vulnerability is particularly dangerous because it affects older browser versions that many organizations may still be using, especially in enterprise environments where browser updates are delayed.
From an adversary perspective, this vulnerability maps to several ATT&CK techniques including T1059 for command and scripting interpreter usage and T1068 for exploit for privilege escalation. The attack surface is broad as it requires only a user to visit a malicious website, making it particularly effective for phishing campaigns and drive-by download attacks. Security professionals should note that this vulnerability was part of a broader class of memory corruption issues that affected Internet Explorer throughout its lifecycle, highlighting the importance of keeping browsers updated and implementing additional security layers such as exploit protection mechanisms and web application firewalls.
Mitigation strategies should include immediate deployment of Microsoft security patches and updates, along with browser hardening measures such as disabling unnecessary browser features and implementing strict content security policies. Organizations should also consider implementing network-based protections including web proxies and intrusion detection systems to monitor for exploitation attempts. Regular security assessments and user education about avoiding suspicious websites are crucial defensive measures. The vulnerability demonstrates the importance of maintaining current security patches and the risks associated with using outdated browser software in enterprise environments.