CVE-2007-2186 in Foxit
Summary
by MITRE
Foxit Reader 2.0 allows remote attackers to cause a denial of service (application crash) via a crafted PDF document.
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Analysis
by VulDB Data Team • 09/07/2024
The vulnerability identified as CVE-2007-2186 affects Foxit Reader version 2.0, a widely used PDF viewer application that has been integrated into numerous enterprise environments and individual workstations. This particular flaw represents a classic denial of service vulnerability that can be exploited through maliciously crafted PDF documents, potentially disrupting legitimate business operations and user productivity. The vulnerability resides within the application's PDF parsing and rendering capabilities, where improper input validation leads to application instability and subsequent crashes.
The technical nature of this vulnerability stems from insufficient validation of PDF file structures and content within Foxit Reader's processing pipeline. When the application encounters a specially crafted PDF document containing malformed or unexpected data sequences, the parsing engine fails to handle these edge cases gracefully, leading to memory corruption or stack overflow conditions that ultimately result in application termination. This type of vulnerability falls under CWE-129, which specifically addresses insufficient validation of input, and represents a common pattern in PDF processing applications where complex file formats require extensive parsing logic that can be overwhelmed by malformed inputs. The vulnerability demonstrates poor defensive programming practices where error conditions are not properly caught and handled, allowing the application to transition into an unstable state rather than gracefully rejecting invalid content.
From an operational impact perspective, this vulnerability presents significant risks to organizations relying on Foxit Reader for document processing and viewing. The remote exploitation capability means that attackers can potentially compromise systems without requiring local access, making this a particularly concerning threat vector. In enterprise environments where PDF documents are frequently shared and processed, a successful exploitation could lead to widespread service disruption, productivity losses, and potential business continuity issues. The vulnerability also aligns with ATT&CK technique T1499.004, which covers "Evasion: File and Path Access Protections," as the malicious PDF could be used to bypass normal document handling procedures and cause system instability. Organizations may experience cascading effects where a single compromised document could affect multiple users or systems, particularly in environments where PDF documents are automatically processed or opened through integrated document management systems.
Mitigation strategies for CVE-2007-2186 should focus on both immediate remediation and long-term defensive measures. The primary recommendation involves upgrading to a patched version of Foxit Reader that properly validates PDF input and implements robust error handling mechanisms to prevent crashes from malformed documents. Organizations should also implement network-based security controls such as PDF content filtering and sandboxing solutions that can analyze and quarantine suspicious PDF files before they reach end-user systems. Additionally, user education regarding the dangers of opening untrusted PDF documents and implementing strict document approval processes can significantly reduce the attack surface. Security teams should monitor for exploitation attempts and consider implementing network segmentation to limit the potential impact of successful attacks, while also ensuring that all PDF processing applications maintain current security patches and follow secure coding practices to prevent similar vulnerabilities from emerging in the future.