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LibELF: Validate PT_GNU_RELRO program header
I'm not sure if this is the correct validation. This is based on it being "read-only after relocation".
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1 changed files with 6 additions and 0 deletions
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@ -202,6 +202,12 @@ bool validate_program_headers(const Elf32_Ehdr& elf_header, size_t file_size, u8
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dbgprintf("Possible shenanigans! Validating an ELF with executable stack.\n");
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dbgprintf("Possible shenanigans! Validating an ELF with executable stack.\n");
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}
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}
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break;
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break;
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case PT_GNU_RELRO:
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if ((program_header.p_flags & PF_X) && (program_header.p_flags & PF_W)) {
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dbgprintf("SHENANIGANS! Program header %zu segment is marked write and execute\n", header_index);
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return false;
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}
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break;
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default:
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default:
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// Not handling other program header types in other code so... let's not surprise them
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// Not handling other program header types in other code so... let's not surprise them
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dbgprintf("Found program header (%zu) of unrecognized type %x!\n", header_index, program_header.p_type);
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dbgprintf("Found program header (%zu) of unrecognized type %x!\n", header_index, program_header.p_type);
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