CVE-2024-24147 identifies a memory leak vulnerability in the parseSWF_FILLSTYLEARRAY function within libming version 0.4.8, a library used for parsing and manipulating SWF (Small Web Format) files, commonly associated with Adobe Flash content. The vulnerability arises from improper memory management during the parsing of the FILLSTYLEARRAY structure in SWF files, leading to a failure to release allocated memory. An attacker can exploit this flaw by crafting a malicious SWF file that triggers the memory leak when processed by libming, causing the application or service to consume increasing amounts of memory. This resource exhaustion can ultimately result in a denial of service (DoS), where the affected system becomes unresponsive or crashes. The CVSS 3.1 base score is 6.5 (medium severity), reflecting that the attack vector is network-based (AV:N), requires no privileges (PR:N), but does require user interaction (UI:R) to process the malicious file. The vulnerability does not compromise confidentiality or integrity but impacts availability. No patches or fixes have been published yet, and no known exploits have been observed in the wild. The underlying weakness corresponds to CWE-401 (Improper Release of Memory Before Removing Last Reference).

The primary impact of CVE-2024-24147 is denial of service through memory exhaustion. Organizations that rely on libming to parse or manipulate SWF files—such as multimedia processing tools, legacy Flash content handlers, or security scanners—may experience application crashes or degraded performance when processing malicious SWF files. This can disrupt business operations, especially in automated environments that handle large volumes of SWF content or user-submitted files. Although the vulnerability does not allow data theft or code execution, the availability impact can be significant in environments where uptime and reliability are critical. The lack of authentication requirements and the network attack vector increase the risk of exploitation, particularly in public-facing services that accept SWF files. However, the requirement for user interaction (processing the crafted file) somewhat limits automated exploitation. The absence of known exploits in the wild suggests limited current threat activity but does not preclude future attacks once exploit code becomes available.

To mitigate CVE-2024-24147, organizations should first identify and inventory all systems and applications using libming, especially version 0.4.8. Until an official patch is released, consider the following specific measures: 1) Implement strict input validation and sandboxing for SWF file processing to isolate the parsing operation and limit memory usage; 2) Employ resource monitoring and limits (e.g., memory quotas, process timeouts) on applications handling SWF files to detect and terminate abnormal memory consumption; 3) Where feasible, disable or remove support for SWF file processing if it is not essential, given the declining use of Flash technology; 4) Use alternative, actively maintained libraries for SWF parsing that do not exhibit this vulnerability; 5) Educate users and administrators about the risks of opening or processing untrusted SWF files; 6) Monitor security advisories from libming maintainers for patches or updates addressing this issue and apply them promptly once available. Additionally, network-level controls such as blocking or filtering SWF files from untrusted sources can reduce exposure.