CVE-2013-3893 is a high-severity use-after-free vulnerability affecting Microsoft Internet Explorer versions 6 through 11. This vulnerability allows remote attackers to execute arbitrary code through crafted JavaScript strings. The exploitation of this vulnerability is particularly concerning due to the potential for remote code execution, which can lead to further compromise of affected systems.
The risk to organizations includes unauthorized access and execution of malicious code, which could lead to data breaches or further system compromises. Given the high CVSS score of 8.8, organizations should prioritize patching immediately.
Currently, this vulnerability is known to have been added to the Known Exploited Vulnerabilities (KEV) catalog, indicating a recognized risk and urgency for remediation. Organizations are advised to address this vulnerability as part of their priority patch cycle.
The exploitation status reveals that there are known exploits available, and public proof-of-concept (PoC) code has been identified. Therefore, organizations should not only patch but also implement monitoring strategies to detect any potential exploitation attempts.
With this in mind, organizations must take a proactive stance in securing their systems against potential exploitation of this vulnerability.
Vulnerability Details
The CVE-2013-3893 vulnerability is classified as a use-after-free vulnerability in the SetMouseCapture implementation within mshtml.dll for Internet Explorer. This vulnerability allows remote code execution, which can be triggered by specially crafted JavaScript strings, exemplified by the use of an ms-help: URL that loads hxds.dll.
The CVSS score for this vulnerability is 8.8, indicating a high severity level. This score signifies that the vulnerability can be exploited over a network with low complexity and requires user interaction, with potential high impacts on confidentiality, integrity, and availability.
Affected products include Microsoft Internet Explorer versions 6 through 11, and the official publication date for this vulnerability was September 18, 2013.
Technical Analysis
The root cause of CVE-2013-3893 is a memory management issue, specifically a use-after-free condition that arises in the SetMouseCapture function. The attack vector is network-based, meaning an attacker can exploit this vulnerability remotely.
The attack complexity is classified as low, as it does not require any special conditions or privileges; however, it does require user interaction to trigger the malicious payload. If successfully exploited, the impact on confidentiality, integrity, and availability is high, as attackers may gain control over the affected system.
Risk & Impact Analysis
The real-world deployment risk associated with CVE-2013-3893 is significant. Organizations still utilizing Internet Explorer face considerable threats, particularly if they have not implemented proper security measures or patches. The blast radius is extensive due to the widespread use of Internet Explorer, potentially allowing attackers to exploit numerous systems.
Given the CVSS base score of 8.8 and its presence in the KEV catalog, organizations are urged to address this vulnerability with urgency. The presence of known exploits and public PoC indicates an immediate need for action to mitigate risks.
Organizations should consider the potential impact on their operations and data integrity should an attacker exploit this vulnerability successfully. The urgency of addressing this vulnerability cannot be overstated, and organizations are advised to incorporate it into their priority patch cycle.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | Yes |
Ransomware Use | No |
Affected Versions
The following versions of Microsoft Internet Explorer are affected by CVE-2013-3893: 6, 7, 8, 9, 10, and both the developer and release previews of version 11. Organizations should ensure that all versions prior to vendor patch are updated.
Mitigation & Remediation
Organizations should prioritize patching Microsoft Internet Explorer to the latest version to mitigate the risks associated with this vulnerability. Users should apply all security updates provided by Microsoft, specifically those related to Security Bulletin MS13-080.
In cases where immediate patching is not feasible, organizations are encouraged to implement workarounds, including disabling the loading of JavaScript strings from ms-help: URLs. Additionally, configuration hardening and network controls should be established to limit exposure to this vulnerability.
For ongoing protection, organizations should incorporate continuous security testing into their vulnerability management program. Regular reviews and updates to security policies will help maintain a robust defense against potential exploits.
Detection Guidance
Organizations should monitor logs for indicators of exploitation attempts, focusing on unusual JavaScript execution patterns and any unexpected loading of hxds.dll. Behavioral anomalies within Internet Explorer should be flagged for further investigation.
Network signatures can be developed to detect communication patterns associated with known exploits. Implementing such monitoring strategies will aid in the early detection of potential attacks targeting this vulnerability.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2013-3893 highlights the importance of robust memory management practices within software development. As seen with this vulnerability, even widely used applications like Internet Explorer can harbor critical security flaws.
This vulnerability represents a pattern of resource management errors that can lead to severe security risks. Security teams should learn from such incidents and ensure thorough testing and validation of memory allocation and deallocation processes in their applications.
Strategically, organizations should prioritize remediation efforts for vulnerabilities classified under the CWE-416 category, as they present substantial risks to confidentiality and integrity.
To further enhance security posture, organizations are encouraged to adopt a comprehensive vulnerability management program. This includes regular patching, proactive monitoring, and incident response planning to mitigate risks associated with vulnerabilities like CVE-2013-3893.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
.webp)