CVE-2015-2498 in Internet Explorer
Summary
by MITRE
Microsoft Internet Explorer 7 through 11 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, aka "Memory Corruption Vulnerability," a different vulnerability than CVE-2015-2486, CVE-2015-2487, CVE-2015-2490, CVE-2015-2492, CVE-2015-2494, and CVE-2015-2499.
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Analysis
by VulDB Data Team • 06/14/2022
This vulnerability represents a critical memory corruption flaw affecting Microsoft Internet Explorer versions 7 through 11, classified under CWE-125 as out-of-bounds read conditions that can lead to arbitrary code execution. The vulnerability arises from improper handling of memory structures when processing crafted web content, specifically involving the interaction between JavaScript engine components and memory management routines. Attackers can exploit this weakness by hosting malicious web pages that trigger buffer overflows or use-after-free conditions within the browser's memory allocation mechanisms. The flaw demonstrates characteristics consistent with advanced persistent threat campaigns where attackers leverage browser-based exploits to establish initial compromise footholds before escalating privileges or deploying additional malware payloads. The vulnerability's classification as a memory corruption issue aligns with ATT&CK technique T1059.007 for command and scripting interpreter usage, as exploitation typically involves JavaScript code execution within the browser context.
The technical implementation of this vulnerability involves manipulating specific memory regions through crafted web content that causes the browser's rendering engine to allocate or access memory beyond its intended boundaries. When Internet Explorer processes malicious content, particularly involving complex object manipulation or dynamic memory allocation patterns, the memory corruption occurs during the JavaScript execution phase or when handling DOM (Document Object Model) elements. This type of vulnerability is particularly dangerous because it can be triggered through standard web browsing activities without requiring user interaction beyond visiting a malicious website. The exploitation mechanism typically involves creating specific memory layouts that cause the browser's memory allocator to behave unpredictably, potentially leading to code execution at the privilege level of the browser process.
From an operational impact perspective, this vulnerability poses significant risks to enterprise environments where Internet Explorer remains in use, particularly in legacy systems or organizations with limited patch management capabilities. The vulnerability's remote exploitability means that attackers can compromise systems simply by hosting malicious content on web servers, making it a prime target for drive-by download attacks and waterhole campaigns. Organizations with older IE versions may face prolonged exposure periods since these browsers are often not updated due to compatibility concerns with legacy applications or restricted IT policies. The vulnerability's similarity to other memory corruption flaws in the same CVE family indicates a broader pattern of memory management issues within Microsoft's browser architecture, suggesting that additional related vulnerabilities may exist within the same codebase.
Mitigation strategies should focus on immediate patch deployment through Microsoft's regular security updates, particularly MS15-051 which addressed this specific vulnerability. Organizations should implement browser hardening measures including disabling unnecessary browser features, implementing content security policies, and deploying web application firewalls to filter malicious content. Network-based mitigations such as implementing browser isolation techniques and restricting access to known malicious domains can provide additional protection layers. Security teams should also consider implementing automated patch management systems to ensure timely deployment of security updates across all supported IE versions. The vulnerability's nature makes it particularly suitable for exploit mitigation through sandboxing approaches and privilege separation techniques, aligning with ATT&CK tactic T1068 for exploit public-facing applications. Regular security assessments and penetration testing should include evaluation of browser-based attack surfaces to identify potential exploitation vectors and ensure proper implementation of security controls.