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LibELF: Reject ELF with program header p_filesz larger than p_memsz
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1 changed files with 7 additions and 0 deletions
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@ -193,6 +193,13 @@ bool validate_program_headers(const Elf32_Ehdr& elf_header, size_t file_size, co
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for (size_t header_index = 0; header_index < num_program_headers; ++header_index) {
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auto& program_header = program_header_begin[header_index];
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if (program_header.p_filesz > program_header.p_memsz) {
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if (verbose)
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dbgln("Program header ({}) has p_filesz ({}) larger than p_memsz ({})", header_index, program_header.p_filesz, program_header.p_memsz);
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return false;
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}
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switch (program_header.p_type) {
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case PT_INTERP:
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// We checked above that file_size was >= buffer size. We only care about buffer size anyway, we're trying to read this!
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