CVE-2024-27336 is a security vulnerability identified in Kofax Power PDF version 5.0.0.57 (build 5.0.0.10.0.23307) involving an out-of-bounds read (CWE-125) during the parsing of PNG image files. The vulnerability stems from insufficient validation of user-supplied data within the PNG parsing logic, which causes the application to read memory beyond the bounds of an allocated object. This can lead to disclosure of sensitive information residing in adjacent memory areas. The vulnerability requires user interaction, such as opening a maliciously crafted PNG file or visiting a malicious webpage that triggers the parsing process. Although the direct impact is information disclosure, the vulnerability can be leveraged in combination with other security flaws to achieve arbitrary code execution within the context of the current process. The attack vector is local (AV:L), with low complexity (AC:L), no privileges required (PR:N), but user interaction is necessary (UI:R). The vulnerability does not affect integrity or availability directly but compromises confidentiality to a limited extent. No patches have been linked yet, and no known exploits are reported in the wild. The vulnerability was initially reported by the Zero Day Initiative (ZDI) under ZDI-CAN-22022 and published on April 3, 2024.

The primary impact of CVE-2024-27336 is the potential disclosure of sensitive information from the memory space of the Kofax Power PDF process. This could include fragments of documents, user credentials, or other sensitive data temporarily held in memory during PDF processing. While the vulnerability alone does not permit code execution or system compromise, it lowers the barrier for attackers to chain this flaw with other vulnerabilities to escalate privileges or execute arbitrary code. For organizations, this could lead to data leakage, intellectual property exposure, and increased risk of targeted attacks. Since exploitation requires user interaction, social engineering or phishing campaigns could be used to deliver malicious PNG files. The low CVSS score reflects the limited scope and complexity, but the risk is non-negligible in environments where sensitive documents are processed using the affected software. Additionally, the lack of a patch increases exposure time until remediation is available.

Organizations should implement the following specific mitigations: 1) Restrict or monitor the opening of PNG files from untrusted sources within Kofax Power PDF, especially in environments handling sensitive data. 2) Employ application whitelisting and sandboxing techniques to isolate Kofax Power PDF processes, limiting the impact of potential exploitation. 3) Educate users about the risks of opening files from unknown or suspicious origins to reduce the likelihood of successful social engineering attacks. 4) Monitor vendor communications closely for official patches or updates addressing this vulnerability and apply them promptly. 5) Use network-level protections such as email filtering and web content scanning to block or flag malicious PNG files before reaching end users. 6) Consider deploying runtime application self-protection (RASP) or endpoint detection and response (EDR) solutions capable of detecting anomalous memory access patterns indicative of exploitation attempts. 7) Conduct regular security assessments and penetration testing focused on document processing workflows to identify and mitigate chained vulnerabilities.