External risk intelligence

Microsoft Silverlight Information Disclosure Vulnerability

CVE advisoryKnown Exploit

CVE-2013-3896

A vulnerability in Microsoft Silverlight could allow attackers to obtain sensitive information. This impacts organizations using the affected product, potentially exposing data. The risk to business operations is heightened as the product is end-of-life and should be disconnected.

1Halo Surface Signal

Microsoft Silverlight

5.0 to before 5.1.20913.0

External exposure likelihood

Halo Surface Signal score for CVE-2013-3896

This vulnerability affects Microsoft Silverlight, a client-side browser plugin. The attack surface is localized to the end-user's workstation where the plugin is installed and executed within a web browser environment, rather than being a reachable network service, gateway, or internet-facing infrastructure component.

Horizon Alert

Summary of the vulnerability and why it matters

Microsoft Silverlight contains a vulnerability that could allow unauthorized access to sensitive information. The flaw exists in how Silverlight handles certain data pointers during element access. If exploited, this weakness could lead to the exposure of confidential data.

  • Vulnerable: Microsoft Silverlight
  • Flaw: Improper pointer validation
  • Impact: Sensitive data exposure

Attack Path

How an attacker could exploit the issue

This vulnerability can impact organizations by allowing attackers to potentially access sensitive information. The attack involves a crafted Silverlight application that exploits a weakness in how pointers are handled. If successful, this could lead to unauthorized disclosure of data.

  • Exposure condition: Use of affected Silverlight elements.
  • Attacker starting point: Remote access.
  • Trigger and result: Crafted application, information disclosure.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow a remote attacker to obtain sensitive information by tricking an employee into opening a specially crafted Silverlight application. The information disclosed could potentially be used to compromise other systems or data. Given that the affected product is end-of-life and should be disconnected, organizations still utilizing it face significant business risk.

  • Attacker skill level: Low
  • Required access or conditions: User interaction with a crafted application
  • Business risk or urgency: High

Priority actions

Operational Fix

Recommended remediation, mitigation, and detection steps

Microsoft Silverlight has a vulnerability that could allow attackers to obtain sensitive information. This issue arises from improper pointer validation within Silverlight elements. The vendor has indicated the product is end-of-life.

  • Identify systems with Silverlight installed.
  • Disconnect Silverlight if still in use.
  • Verify complete removal.

Frequently asked questions

What is Microsoft Silverlight?

Microsoft Silverlight was a plug-in for delivering rich, interactive applications and media experiences over the web. It enabled dynamic websites and web applications with desktop-like features.

How does CVE-2013-3896 lead to sensitive information disclosure?

CVE-2013-3896 is a weakness where Microsoft Silverlight improperly validates pointers when accessing its elements. A specially crafted Silverlight application could exploit this to gain access to sensitive data.

What is the attack vector for CVE-2013-3896?

Exploitation of this vulnerability requires a user to interact with a specially crafted Silverlight application. A remote attacker could trigger this by tricking an employee into opening such an application.

What is the relevance of CVE-2013-3896 to an organization's security posture?

This vulnerability allows remote attackers to obtain sensitive information. Given that Silverlight is end-of-life, organizations still using it face significant business risk due to potential data exposure and further compromise of systems.

What steps should be taken to address the Silverlight vulnerability?

Organizations should identify all systems with Microsoft Silverlight installed. If Silverlight is still in use, it must be disconnected immediately and verified as completely removed to mitigate risk.

References