CVE-2024-5305 is a stack-based buffer overflow vulnerability identified in Kofax Power PDF version 5.0.0.57. The flaw exists in the PDF parsing component where the software fails to properly validate the length of user-supplied data before copying it into a fixed-size stack buffer. This lack of bounds checking allows an attacker to overflow the buffer, overwriting adjacent memory on the stack. Such memory corruption can be leveraged to execute arbitrary code with the privileges of the Power PDF process. Exploitation requires user interaction, typically by convincing a user to open a crafted malicious PDF file or visit a malicious webpage that triggers the vulnerability. The vulnerability is classified under CWE-121 (Stack-based Buffer Overflow) and was assigned a CVSS v3.0 base score of 7.8, indicating high severity. The attack vector is local (AV:L) since the user must open a malicious file or webpage, attack complexity is low (AC:L), no privileges are required (PR:N), but user interaction is necessary (UI:R). The impact on confidentiality, integrity, and availability is high (C:H/I:H/A:H) because arbitrary code execution can lead to full system compromise. Currently, no patches or exploits are publicly available, but the vulnerability is publicly disclosed and should be considered a significant risk for affected users.

The vulnerability allows remote attackers to execute arbitrary code within the context of the Kofax Power PDF process, potentially leading to full system compromise. This can result in unauthorized access to sensitive documents, data theft, installation of malware, or disruption of business operations. Since the vulnerability requires user interaction, social engineering or phishing campaigns could be used to deliver malicious PDFs or links. Organizations relying on Kofax Power PDF for document processing, especially those handling sensitive or regulated information, face risks to confidentiality, integrity, and availability. The impact is amplified in environments where users have elevated privileges or where the application runs with high system rights. Additionally, exploitation could serve as an initial foothold for further lateral movement within corporate networks.

1. Monitor Kofax communications and security advisories for official patches or updates addressing CVE-2024-5305 and apply them promptly once released. 2. Until patches are available, implement application whitelisting to restrict execution of untrusted PDF files and limit Power PDF usage to trusted sources. 3. Employ endpoint protection solutions with behavior-based detection to identify and block exploitation attempts targeting buffer overflows. 4. Educate users about the risks of opening unsolicited or suspicious PDF files and links, emphasizing cautious handling of email attachments and web content. 5. Use network-level controls such as email filtering and web proxy solutions to block or quarantine potentially malicious PDFs. 6. Consider sandboxing or isolating Power PDF usage in virtualized or containerized environments to limit potential damage from exploitation. 7. Regularly audit and restrict user privileges to minimize the impact of a compromised process. 8. Enable exploit mitigation technologies such as Data Execution Prevention (DEP) and Address Space Layout Randomization (ASLR) on endpoints running Power PDF to increase exploitation difficulty.