CVE-2024-7724 is a use-after-free vulnerability (CWE-416) identified in Foxit PDF Reader version 2024.1.0.23997, specifically within the handling of AcroForms, which are interactive form elements in PDF documents. The vulnerability occurs because the software does not verify the existence of an object before performing operations on it, leading to a use-after-free condition. This memory corruption flaw can be exploited by an attacker who convinces a user to open a specially crafted malicious PDF file or visit a malicious webpage containing such a file. Upon exploitation, the attacker can execute arbitrary code within the context of the Foxit PDF Reader process, potentially leading to full system compromise depending on the privileges of the user running the application. The vulnerability requires user interaction but does not require prior authentication or elevated privileges, increasing its risk profile. The CVSS v3.0 base score is 7.8, indicating high severity with impacts on confidentiality, integrity, and availability. No public exploits or patches are currently available, but the vulnerability was responsibly disclosed and tracked as ZDI-CAN-23900. This flaw highlights the risks associated with complex PDF features like AcroForms and the importance of robust memory management in PDF readers.

The impact of CVE-2024-7724 is significant for organizations globally that use Foxit PDF Reader, especially version 2024.1.0.23997. Successful exploitation allows remote attackers to execute arbitrary code, potentially leading to full system compromise, data theft, or disruption of services. Since PDF readers are widely used in enterprises, government agencies, and critical infrastructure sectors for document handling, this vulnerability could be leveraged for targeted attacks, espionage, or ransomware deployment. The requirement for user interaction (opening a malicious PDF) means phishing or social engineering campaigns could be effective attack vectors. The vulnerability affects confidentiality by enabling unauthorized data access, integrity by allowing code execution that can alter system behavior, and availability by potentially crashing or disabling the application or system. The lack of known exploits in the wild currently reduces immediate risk but does not eliminate the threat, especially as exploit code may emerge. Organizations with high reliance on PDF workflows and those with users who frequently handle external documents are at elevated risk.

Organizations should implement the following specific mitigations: 1) Monitor Foxit’s official channels for patches addressing CVE-2024-7724 and apply updates immediately upon release. 2) Until patched, restrict usage of Foxit PDF Reader to trusted documents only and consider disabling or limiting AcroForm functionality if configurable. 3) Employ application whitelisting and sandboxing techniques to isolate PDF reader processes and limit the impact of potential exploitation. 4) Enforce strict email and web filtering to block or quarantine suspicious PDF attachments and links. 5) Educate users about the risks of opening unsolicited or unexpected PDF files, especially from unknown sources. 6) Use endpoint detection and response (EDR) solutions to monitor for anomalous behavior indicative of exploitation attempts. 7) Consider deploying alternative PDF readers with a lower risk profile or better security track record in sensitive environments. 8) Implement the principle of least privilege for users running Foxit PDF Reader to minimize potential damage from code execution.