CVE-2013-7331 refers to a vulnerability in the Microsoft.XMLDOM ActiveX control found in Microsoft Internet Explorer versions 6 through 11. This vulnerability allows remote attackers to determine the existence of local pathnames, UNC share pathnames, intranet hostnames, and IP addresses by examining error codes. The exposure was actively exploited in the wild in February 2014, making it critical for organizations using affected versions to address this vulnerability immediately.
With a CVSS score of 6.5, this vulnerability is classified as medium severity. Although it does not allow direct access to sensitive data, the knowledge gained by an attacker could aid in further exploits. Risk to organizations includes potential information disclosure that could lead to subsequent attacks or breaches.
As of now, there are no public exploits confirmed for this vulnerability. However, due to its presence in the Known Exploited Vulnerabilities (KEV) catalog, organizations should prioritize patching to mitigate risks associated with this vulnerability.
Organizations should prioritize patching immediately. The longer this vulnerability remains unaddressed, the greater the risk of exploitation and potential data exposure.
Vulnerability Details
The Microsoft.XMLDOM ActiveX control in Microsoft Windows 8.1 and earlier allows remote attackers to determine the existence of local pathnames, UNC share pathnames, intranet hostnames, and intranet IP addresses by examining error codes. This vulnerability is classified under CWE-209, which deals with information exposure.
The CVSS score for this vulnerability is 6.5, indicating medium severity. The attack vector is network-based, with low complexity and requires no privileges or user interaction. The impacts on confidentiality, integrity, and availability are classified as low, none, and low respectively.
Technical Analysis
The root cause of this vulnerability lies in the handling of error codes by the Microsoft.XMLDOM ActiveX control. The ability to infer local paths and network details from these error messages poses a significant risk, particularly in environments where sensitive data is processed or stored.
The attack vector is remote, meaning an attacker does not need local access to exploit this vulnerability. The attack complexity is low, as it requires no special conditions or privileges. No user interaction is necessary, making this vulnerability particularly dangerous.
The impacts of a successful exploitation would primarily affect confidentiality, allowing attackers to gain insights into the internal structure of the network. Integrity and availability impacts are not expected, as the vulnerability does not allow for data modification or denial of service.
Risk & Impact Analysis
The real-world deployment risk associated with CVE-2013-7331 is significant, particularly for organizations using Internet Explorer in internal networks. Attackers may leverage the information disclosed to map out the network and target other vulnerabilities or systems.
Risk to organizations includes exposure of internal paths and resources, which can lead to increased chances of data breaches or unauthorized access. The potential blast radius includes all systems that rely on Internet Explorer, making the urgency to remediate high.
Given the CVSS score and its classification in the KEV catalog, organizations should address this vulnerability in their immediate patch cycle. The higher percentile of the EPSS score (99.2%) indicates a high likelihood of exploitation, underscoring the critical need for prompt remediation.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | Yes |
Ransomware Use | No |
Affected Versions
The vulnerability affects multiple versions of Internet Explorer, specifically versions 6 through 11. Organizations should assume that all versions prior to vendor patch are vulnerable.
Mitigation & Remediation
To mitigate this vulnerability, Microsoft has released patches as per their security advisory. Organizations should apply updates as instructed in the vendor advisory. If patching is not immediately feasible, consider implementing configuration changes to minimize exposure.
Continuous monitoring and network controls can help detect any exploitation attempts. For further guidance on remediation strategies, organizations can consult the penetration testing services to validate their security posture.
Detection Guidance
Organizations should monitor logs for any unusual error messages or patterns that may indicate attempts to exploit this vulnerability. Behavioral anomalies in systems running Internet Explorer may also indicate exposure. Network signatures corresponding to known exploitation attempts should be documented and monitored.
AppSecure Threat Intelligence Insight
CVE-2013-7331 highlights the persistent risk associated with older software components. Organizations must remain vigilant in keeping their systems updated and monitor for vulnerabilities in legacy applications. The presence of this vulnerability in the KEV catalog signifies its relevance in current threat landscapes.
For comprehensive understanding and remediation planning, organizations should refer to the penetration testing methodology, and consider engaging in vulnerability management programs to continually assess and improve security measures.
Additionally, understanding the API penetration testing implications can further strengthen defenses against similar attacks.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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