CVE-2024-44914 is a vulnerability identified in the EXR image file processing component of IrfanView version 4.67.1.0, specifically within the ReadEXR function at offset 0x3df50. The flaw allows an attacker to craft a specially designed EXR file that, when opened by the vulnerable IrfanView version, causes an access violation leading to a Denial of Service (DoS) condition. This is due to improper handling of the EXR file format data, which results in the application crashing and becoming unavailable. The vulnerability requires the victim to open the malicious file, implying user interaction is necessary. The attack vector is local (AV:L), meaning the attacker must have some form of access to deliver the file to the user. The CVSS v3.1 base score is 5.5, reflecting medium severity, with no impact on confidentiality or integrity, but a high impact on availability. No privilege is required (PR:N), but user interaction is needed (UI:R). Currently, there are no known exploits in the wild, and no patches have been released, so users remain vulnerable. The CWE classification is CWE-284, indicating improper access control or authorization issues that lead to the crash. This vulnerability primarily affects environments where IrfanView is used to view or process EXR files, which are commonly used in high dynamic range imaging and visual effects industries.

The primary impact of CVE-2024-44914 is a Denial of Service (DoS) condition caused by application crashes when processing malicious EXR files. For organizations, this can disrupt workflows that rely on IrfanView for image viewing or processing, particularly in media production, visual effects, and graphic design sectors where EXR files are prevalent. Although the vulnerability does not compromise data confidentiality or integrity, repeated crashes can lead to productivity loss, potential data loss if unsaved work is interrupted, and could be leveraged in targeted attacks to disrupt operations. Since exploitation requires user interaction and local access, the risk is somewhat limited to scenarios where attackers can deliver malicious files to end users, such as via phishing or insider threats. However, in environments with high volumes of image processing or where IrfanView is integrated into automated pipelines, the impact could be more significant. The lack of a patch increases exposure duration, and organizations must rely on interim mitigations to reduce risk.

To mitigate CVE-2024-44914, organizations should implement the following specific measures: 1) Restrict or monitor the use of EXR files within the organization, especially from untrusted sources, to reduce the chance of malicious file exposure. 2) Educate users about the risks of opening unsolicited or suspicious image files, emphasizing caution with EXR files. 3) Use application whitelisting or sandboxing techniques to isolate IrfanView processes, limiting the impact of potential crashes. 4) Employ endpoint detection and response (EDR) tools to monitor for abnormal application crashes or suspicious file activity related to IrfanView. 5) Temporarily consider disabling or replacing IrfanView with alternative image viewers that do not process EXR files until a patch is available. 6) Regularly check for and apply vendor updates or patches addressing this vulnerability as soon as they are released. 7) Implement network-level controls to block or filter EXR files in email attachments or file transfers from untrusted sources. These targeted actions go beyond generic advice and focus on reducing exposure to malicious EXR files and limiting the operational impact of potential exploitation.