Horizon Alert
Summary of the vulnerability and why it matters
Microsoft Internet Explorer versions 9 and 10 contain a use-after-free vulnerability. This flaw can be exploited through crafted JavaScript code when interacting with specific markup elements. Successful exploitation could allow an attacker to execute arbitrary code on the affected system, potentially leading to broader business disruption.
- Vulnerable component: Microsoft Internet Explorer
- Core weakness: Use-after-free vulnerability
- Main business impact: Arbitrary code execution
Attack Path
How an attacker could exploit the issue
A use-after-free vulnerability in Microsoft Internet Explorer can allow attackers to execute arbitrary code. This attack typically involves a user visiting a malicious website that contains specially crafted JavaScript code. When the browser processes this code, it can lead to a memory corruption issue. This memory corruption can then be exploited by the attacker to gain control over the affected system.
- Exposure condition: Internet Explorer browsing a malicious website.
- Attacker starting point: Remote, unauthenticated.
- Trigger and result: Malicious JavaScript causes memory corruption, enabling code execution.
Live Threat
Current exploitation, exposure, and threat context
This vulnerability presents a significant risk, allowing remote attackers to execute arbitrary code on affected systems. The exploitation involves specially crafted JavaScript code within a web browser, indicating that attackers with moderate skill could leverage this weakness. Organizations using the affected browser versions face potential system compromise and data breaches if this vulnerability is exploited.
- Likely attacker skill level: Moderate.
- Required access or conditions: Internet access to a vulnerable browser.
- Business risk or urgency: High.
Priority actions
Operational Fix
Recommended remediation, mitigation, and detection steps
A use-after-free vulnerability in Microsoft Internet Explorer could allow attackers to execute arbitrary code. This risk stems from how the browser handles certain JavaScript code and properties, potentially leading to system compromise. Organizations should take steps to identify and mitigate this vulnerability to protect their systems and data.
- Find affected Microsoft Internet Explorer assets.
- Reduce exposure or isolate affected systems.
- Apply vendor fixes and validate.
- Monitor for related issues.
