CVE-2024-27340 is a heap-based buffer overflow vulnerability identified in Kofax Power PDF version 5.0.0.57, specifically within the PDF file parsing component. The root cause is the lack of proper validation of the length of user-supplied data before copying it into a fixed-length heap buffer. This flaw allows an attacker to craft malicious PDF files that, when opened by a user, cause a buffer overflow on the heap. The overflow can overwrite adjacent memory, enabling arbitrary code execution in the context of the Power PDF application process. Exploitation requires user interaction, such as opening a malicious PDF or visiting a malicious webpage that triggers the vulnerability. The vulnerability is tracked as CWE-122 (Heap-based Buffer Overflow) and was assigned by the Zero Day Initiative (ZDI) as ZDI-CAN-22926. The CVSS v3.0 base score is 7.8, indicating high severity, with attack vector local (user must open the file), low attack complexity, no privileges required, user interaction required, and high impact on confidentiality, integrity, and availability. No patches or public exploits are currently reported, but the risk remains significant due to the potential for remote code execution. This vulnerability affects organizations using Kofax Power PDF 5.0.0.57, a widely used PDF management tool in enterprise environments.

The impact of CVE-2024-27340 is substantial for organizations relying on Kofax Power PDF 5.0.0.57. Successful exploitation allows attackers to execute arbitrary code remotely within the context of the vulnerable application, potentially leading to full system compromise depending on the privileges of the user running the software. This can result in unauthorized access to sensitive documents, data theft, installation of malware, lateral movement within networks, and disruption of business operations. Since the attack requires user interaction, social engineering or phishing campaigns could be used to deliver malicious PDFs. The vulnerability affects confidentiality, integrity, and availability, making it a critical risk for sectors handling sensitive information such as finance, healthcare, legal, and government. The absence of known public exploits currently reduces immediate risk but does not eliminate the threat, especially as attackers may develop exploits once the vulnerability details are widely known.

To mitigate CVE-2024-27340, organizations should take the following specific actions: 1) Immediately check for and apply any official patches or updates from Kofax addressing this vulnerability; if none are available, contact Kofax support for guidance or workarounds. 2) Implement strict email and web filtering to block or quarantine suspicious PDF attachments and links, reducing the risk of malicious file delivery. 3) Educate users about the risks of opening unsolicited or unexpected PDF files, emphasizing caution with attachments from unknown or untrusted sources. 4) Employ endpoint protection solutions with behavior-based detection to identify and block exploitation attempts targeting PDF parsing vulnerabilities. 5) Use application whitelisting and sandboxing for PDF readers to limit the impact of potential exploitation. 6) Monitor logs and network traffic for unusual activity indicative of exploitation attempts. 7) Consider disabling or restricting the use of Kofax Power PDF in high-risk environments until a patch is available. These targeted measures go beyond generic advice by focusing on controlling attack vectors and limiting exposure specific to this vulnerability.