CVE-2013-3897 is a high-severity use-after-free vulnerability in the CDisplayPointer class within mshtml.dll in Microsoft Internet Explorer versions 6 through 11. This vulnerability allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) by exploiting crafted JavaScript code that utilizes the onpropertychange event handler. The vulnerability was actively exploited in the wild, particularly noted in September and October 2013.
With a CVSS score of 8.8, this vulnerability is classified as high severity, indicating a significant risk to organizations using affected versions of Internet Explorer. The potential for arbitrary code execution poses a direct threat to system integrity and confidentiality.
Organizations should prioritize patching immediately to mitigate risks associated with this vulnerability. Given its ease of exploitation and the potential consequences, prompt action is essential.
This vulnerability underscores the ongoing need for robust security measures, especially in widely used applications like web browsers.
Vulnerability Details
The official CVE description states: 'Use-after-free vulnerability in the CDisplayPointer class in mshtml.dll in Microsoft Internet Explorer 6 through 11 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via crafted JavaScript code that uses the onpropertychange event handler, as exploited in the wild in September and October 2013, aka "Internet Explorer Memory Corruption Vulnerability."'
The vulnerability is classified under CWE-416, which corresponds to use-after-free issues. The CVSS score of 8.8 indicates a high severity, with impacts on confidentiality, integrity, and availability rated as high.
Technical Analysis
The root cause of this vulnerability lies in improper memory management within the CDisplayPointer class. Attackers can exploit this flaw by using specially crafted JavaScript that interacts with the onpropertychange event handler, leading to memory corruption.
The attack vector for this vulnerability is network-based, requiring user interaction to trigger the exploit. The attack complexity is low, and the privileges required are none, making it accessible for a wide range of attackers.
The impact of successful exploitation includes high confidentiality, integrity, and availability impact, as attackers may gain control over the affected system, leading to potential data breaches and service disruptions.
Risk & Impact Analysis
Risk to organizations includes the potential for unauthorized access to sensitive data, leading to data breaches and compliance violations. The blast radius of this vulnerability could extend across any organization still utilizing affected versions of Internet Explorer, particularly in enterprise environments.
Given the high CVSS score and active exploitation in the wild, organizations must assess their exposure and act swiftly. The urgency for remediation is critical, and patch management should be prioritized to protect against this vulnerability.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | Yes |
Ransomware Use | No |
Affected Versions
Affected versions include Microsoft Internet Explorer 6 through 11. Organizations using these versions should review their systems for exposure and take immediate action.
Mitigation & Remediation
Organizations should apply the latest security updates provided by Microsoft to remediate this vulnerability. The patch can be found in Microsoft Security Bulletin MS13-080. For those unable to immediately apply the patch, consider implementing workarounds such as disabling the onpropertychange event handler in JavaScript.
Additionally, organizations may benefit from engaging in penetration testing to identify similar weaknesses and enhance overall security posture.
Detection Guidance
Organizations should monitor logs for any unusual JavaScript execution patterns and onpropertychange event handler invocations. Additionally, behavioral anomalies in the Internet Explorer application should be scrutinized to detect potential exploitation attempts.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2013-3897 highlights the importance of continuous security vigilance in web browser applications, especially regarding memory management vulnerabilities. This incident represents a pattern of increasing exploitation of web-based vulnerabilities, particularly those that can lead to remote code execution.
Security teams should learn from past incidents to strengthen their defenses. Implementing a robust vulnerability management program will aid in early detection and remediation of potential threats.
For further insights on vulnerability management, consider reviewing our guide on vulnerability management programs and stay informed about the latest trends in web security.
Engaging in proactive security measures, including regular security assessments and updates, is vital for maintaining organizational resilience.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
.webp)