External risk intelligence

Microsoft Office Malformed EPS File Vulnerability.

CVE advisoryKnown Exploit

CVE-2015-2545

Microsoft Office applications have a vulnerability in how they handle specially crafted EPS image files, potentially allowing attackers to execute arbitrary code on affected systems. This poses a business risk of unauthorized system control and data compromise. Organizations should address this vulnerability by applyin

1Halo Surface Signal

Microsoft Office

2007201020132016

External exposure likelihood

Halo Surface Signal score for CVE-2015-2545

This vulnerability resides in a client-side desktop application (Microsoft Office) and requires the user to open a specifically crafted file. It is not an internet-facing service, network edge component, or reachable public endpoint.

Horizon Alert

Summary of the vulnerability and why it matters

Microsoft Office applications are vulnerable due to an issue with how they process specially crafted EPS image files. This flaw can allow attackers to execute arbitrary code on an organization's systems. The potential business impact includes unauthorized system control and data compromise.

  • Vulnerable Microsoft Office files.
  • Malformed EPS image processing.
  • Arbitrary code execution.
  • System compromise and data loss.

Attack Path

How an attacker could exploit the issue

Microsoft Office applications process malformed EPS image files to enable remote attackers to execute arbitrary code. This vulnerability occurs when an EPS image file is opened within a vulnerable version of Microsoft Office. Attackers can leverage this to gain control over the affected system.

  • Malformed EPS image exposure.
  • Attacker provides crafted image.
  • Triggering EPS file opens.
  • Arbitrary code execution.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow attackers to execute arbitrary code on a system by tricking an organization's employees into opening a specially crafted EPS image file. The impact of such an attack could include unauthorized access to sensitive data, system compromise, and disruption of business operations. Given the potential for significant damage, organizations should prioritize addressing this vulnerability.

  • Likely attacker skill: Low to moderate.
  • Required access: User interaction with a malicious file.
  • Business risk: High urgency.

Priority actions

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability allows attackers to execute arbitrary code by embedding a crafted EPS image within a document. Organizations utilizing affected Microsoft Office versions face a risk of compromise if users open malicious documents containing these images. The attack vector requires user interaction, meaning an employee must open a specially crafted file.

  • Identify affected Microsoft Office assets.
  • Reduce exposure by limiting document processing.
  • Apply vendor fixes and validate.
  • Monitor for related security issues.

Frequently asked questions

What is Microsoft Office and its general purpose?

Microsoft Office is a suite of productivity applications, including Word, Excel, and PowerPoint. It is used for creating documents, managing data, and preparing presentations, serving as a core tool for many daily business tasks.

What type of weakness exists in CVE-2015-2545?

CVE-2015-2545 is a weakness characterized by improper input validation. Microsoft Office handles specially crafted EPS image files incorrectly, which can lead to security vulnerabilities.

How might an attacker exploit CVE-2015-2545?

An attacker could exploit this vulnerability by providing a specially crafted EPS image file. When opened within a vulnerable version of Microsoft Office, this file can lead to the execution of arbitrary code.

What is the relevance of CVE-2015-2545 based on the Halo Surface Signal?

The Halo Surface Signal indicates this vulnerability is 'Very unlikely' to be exploited because it affects client-side desktop applications and requires user interaction to open a crafted file, rather than targeting internet-facing services.

What steps should be taken to address CVE-2015-2545?

To address this vulnerability, organizations should identify affected Microsoft Office versions, limit the processing of untrusted documents, apply vendor-provided security updates, and continuously monitor for related security advisories. This helps mitigate the risk of unauthorized code execution.

References

Cyber Threat Intelligence (CTI)

Sources: threatActor, tool