External risk intelligence

Microsoft Office RTF Document Vulnerability

CVE advisoryKnown Exploit

CVE-2016-7193

Microsoft Office is vulnerable to code execution via crafted RTF documents. This presents a risk to organizations if employees open malicious files, potentially leading to system compromise and data exposure.

1Halo Surface Signal

Memory Corruption

Microsoft Office

20072010201620112013

External exposure likelihood

Halo Surface Signal score for CVE-2016-7193

The vulnerability affects client-side software (Microsoft Office applications) and requires the user to open a specially crafted document to trigger the issue. It does not involve a network-accessible service, listener, or gateway that would be exposed to the public internet by design.

Horizon Alert

Summary of the vulnerability and why it matters

Microsoft Office applications are vulnerable to a memory corruption flaw when processing specially crafted RTF documents. This weakness could allow attackers to execute arbitrary code on affected systems. The potential business impact includes unauthorized code execution, leading to system compromise and potential data breaches.

  • Vulnerable Microsoft Office components.
  • Memory corruption flaw in RTF processing.
  • Risk of arbitrary code execution.

Attack Path

How an attacker could exploit the issue

A specially crafted RTF document can lead to arbitrary code execution on affected Microsoft Office systems. Attackers can leverage this vulnerability by providing a malicious document to users, which, when opened, allows the attacker to gain control. This could result in unauthorized access and manipulation of sensitive organizational data and systems.

  • Malicious RTF document exposure.
  • Attacker initiates code execution.
  • Control over affected systems.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability in Microsoft Office allows attackers to execute arbitrary code through specially crafted RTF documents. The risk of exploitation is elevated because it is listed on the Known Exploited Vulnerabilities catalog. Organizations should treat this as a high-priority threat requiring immediate attention to mitigate potential business disruption.

  • Attacker skill level: Moderate
  • Required access or conditions: User interaction needed
  • Business risk or urgency: High

Priority actions

Operational Fix

Recommended remediation, mitigation, and detection steps

A memory corruption vulnerability has been identified in Microsoft Office applications that could allow attackers to execute arbitrary code through crafted RTF documents. This poses a risk to organizations using affected versions of the software, potentially impacting system integrity and data confidentiality. The identified vulnerability requires direct user interaction, such as opening a malicious document, to be exploited.

  • Identify affected Microsoft Office assets.
  • Reduce exposure by limiting document handling.
  • Apply vendor patches and verify fixes.
  • Monitor systems for related incidents.

Frequently asked questions

What are the primary uses of Microsoft Office applications like Word, Excel, and PowerPoint?

Microsoft Office is a suite of productivity applications. Word is used for word processing, Excel for spreadsheet management, and PowerPoint for creating presentations. These tools are essential for daily tasks involving document creation, data analysis, and communication in both personal and professional environments.

What type of weakness does CVE-2016-7193 represent, and what is its classification?

CVE-2016-7193 is a memory corruption vulnerability. It is classified under CWE-119, which indicates that a program is writing data beyond the allocated buffer in memory. This flaw can be exploited by attackers to overwrite adjacent memory, potentially leading to the execution of arbitrary code.

How could an attacker exploit CVE-2016-7193, and what is the scope of the impact?

Attackers can exploit this vulnerability by creating a specially crafted RTF document. When a user opens this document in an affected Microsoft Office application, it can trigger the memory corruption. The scope is generally limited to the user's machine, but successful exploitation allows an attacker to execute arbitrary code, potentially leading to broader system compromise if the user has elevated privileges.

Why is CVE-2016-7193 considered a relevant threat, and what is its specific context regarding the Halo Surface Signal?

This vulnerability is relevant due to its presence on the Known Exploited Vulnerabilities (KEV) catalog, indicating active exploitation. The Halo Surface Signal assesses this vulnerability as 'Very unlikely' to be exposed to the public internet because it primarily affects client-side software and requires user interaction (opening a malicious document) rather than exploiting a network-accessible service.

What practical steps should organizations take to address the risk posed by CVE-2016-7193?

Organizations should identify all Microsoft Office assets that may be affected by this vulnerability. It is crucial to apply vendor-provided patches and security updates promptly to all systems. Additionally, implementing security awareness training for users regarding the dangers of opening untrusted documents can further mitigate the risk.

References