Horizon Alert
Summary of the vulnerability and why it matters
The Microsoft.XMLDOM ActiveX control within Microsoft Internet Explorer and Windows operating systems contains a flaw that could allow attackers to uncover local pathnames, network share details, and intranet hostnames or IP addresses. This information disclosure can occur by examining error codes returned by the control. The vulnerability has been exploited in the wild, potentially enabling attackers to gain insights into an organization's internal network structure.
- Vulnerable component: Microsoft.XMLDOM ActiveX control
- Core weakness: Error codes reveal internal system information
- Main business impact: Information disclosure of local paths and hostnames
Attack Path
How an attacker could exploit the issue
This vulnerability allows an attacker to gain insights into local system configurations by observing error messages. An attacker could leverage this by directing a user to a specially crafted web page. This interaction reveals information about local file paths, network shares, and hostnames, potentially aiding further malicious activities.
- Exposure condition: Internet Explorer processes web content.
- Attacker starting point: Remote, via a malicious website.
- Trigger and result: User visits a malicious site; attacker learns system path information.
Live Threat
Current exploitation, exposure, and threat context
This vulnerability could enable attackers to discover local file paths and network locations. The attackers could then use this information to identify potential targets for further exploitation. The risk is considered medium, and organizations should consider prioritizing remediation.
- Likely attacker skill level: Low.
- Required access or conditions: Remote, no user interaction.
- Business risk or urgency: Medium.
Priority actions
Operational Fix
Recommended remediation, mitigation, and detection steps
This vulnerability allows attackers to discover local and network paths, hostnames, and IP addresses by examining error codes. Exploitation in the wild has been documented, posing a risk to organizations by potentially revealing sensitive network information. The Microsoft.XMLDOM ActiveX control in Internet Explorer is the affected component.
- Identify exposed assets.
- Reduce exposure or isolate risk.
- Fix, verify, and monitor.
