CVE-2017-8513 in PowerPoint
Summary
by MITRE
A remote code execution vulnerability exists in Microsoft PowerPoint when the software fails to properly handle objects in memory, aka "Microsoft PowerPoint Remote Code Execution Vulnerability".
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Analysis
by VulDB Data Team • 12/28/2020
The vulnerability identified as CVE-2017-8513 represents a critical remote code execution flaw in Microsoft PowerPoint that stems from improper handling of memory objects within the application. This weakness allows attackers to execute arbitrary code on affected systems without requiring authentication, making it particularly dangerous in enterprise environments where PowerPoint documents are frequently shared and opened. The vulnerability specifically affects Microsoft PowerPoint 2010, 2013, 2016, and Office 2016, as well as Office 2010 and Office 2013 when used with PowerPoint Viewer. The flaw resides in how PowerPoint processes certain file formats, particularly those containing maliciously crafted objects that trigger buffer overflows or memory corruption during document rendering.
From a technical perspective, this vulnerability manifests when PowerPoint encounters specially crafted data structures within presentation files that cause the application to allocate memory improperly. The issue falls under CWE-121, which describes heap-based buffer overflow conditions, and specifically relates to improper validation of memory objects during file parsing operations. When a user opens a maliciously crafted PowerPoint file, the application attempts to process these malformed objects and inadvertently executes attacker-controlled code within the context of the user's privileges. This type of vulnerability is classified as a use-after-free condition or memory corruption issue that enables arbitrary code execution through the exploitation of memory handling flaws in the application's object model.
The operational impact of CVE-2017-8513 extends beyond simple remote code execution, as it aligns with several tactics described in the MITRE ATT&CK framework including initial access through malicious files and execution via compromised applications. Attackers can leverage this vulnerability by distributing malicious PowerPoint files through spearphishing campaigns, compromised websites, or social engineering tactics, making it particularly effective in targeted attacks against organizations. The vulnerability can be exploited in various scenarios including email attachments, web downloads, and network shares where PowerPoint documents are opened automatically. Successful exploitation allows attackers to gain full control over the affected system, potentially leading to data theft, persistence mechanisms, or further network infiltration.
Mitigation strategies for this vulnerability include immediate deployment of Microsoft security patches, which address the memory handling issues in PowerPoint's object processing routines. Organizations should implement strict file validation policies, particularly for PowerPoint files received from external sources, and consider disabling automatic opening of files from untrusted sources. Network segmentation and application whitelisting can provide additional protection layers, while user education regarding suspicious email attachments and document sources remains crucial. The vulnerability demonstrates the importance of maintaining up-to-date software patches and implementing defense-in-depth strategies that combine technical controls with administrative procedures to prevent exploitation of memory corruption vulnerabilities in office applications.