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Progress Report

Progress Report. Bin Zeng Friday 02/07/2014. Finished. Add the taint sink checking for indirect control flow transfers such as ret, indirect call etc. Add the taint tag initialization for taint sources such as file input r ead function Wrote the paper Still some more writing to do.

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Progress Report

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  1. Progress Report Bin Zeng Friday 02/07/2014

  2. Finished • Add the taint sink checking for indirect control flow transfers such as ret, indirect call etc. • Add the taint tag initialization for taint sources such as file input • read function • Wrote the paper • Still some more writing to do

  3. Indirect Call Instrumentation callq *-8(%rbp) leaq-8(%rbp), %rax shrq $3, %rax addq $17592186044416, %rax# 0x100000000000 movq (%rax), %al cmpb $0, %al jne 0 callq *-8(%rbp)

  4. Ret Instruction Instrumentation ret movq%rsp, %rcx shrq $3, %rcx addq $17592186044416, %rcx# 0x100000000000 movq (%rcx), %cl cmpb $0, %cl jne 0 ret

  5. File read instrumentation %92 = load i32* %fd, align 4 %93 = ptrtoint i8** %vbuf.addr to i64 %94 = lshr i64 %93, 3 %95 = add i64 %94, 2147450880 %96 = inttoptr i64 %95 to i8* %97 = load i8* %96 %98 = load i8** %vbuf.addr, align 8 %99 = ptrtoint i64* %count.addr to i64 %100 = lshr i64 %99, 3 %101 = add i64 %100, 2147450880 %102 = inttoptr i64 %101 to i8* %103 = load i8* %102 %104 = load i64* %count.addr, align 8 %ss_sptr_int28 = load i64* @__dtt_stack_pointer %ss_sptr29 = inttoptr i64 %ss_sptr_int28 to i8* %105 = ptrtoint i8* %ss_sptr29 to i64 %106 = sub i64 %105, 4 store i64 %106, i64* @__dtt_stack_pointer %107 = inttoptr i64 %106 to i8* %108 = getelementptr i8* %107, i32 0 store i8 0, i8* %108 %109 = getelementptr i8* %107, i32 1 store i8 %91, i8* %109 %110 = getelementptr i8* %107, i32 2 store i8 %97, i8* %110 %111 = getelementptr i8* %107, i32 3 store i8 %103, i8* %111 %call = call i64 @read(i32 %92, i8* %98, i64 %104) call void @__dtt_taint_read(i8* %98, i64 %call, i32 1)

  6. Compiler optimization on taint tracking

  7. Compiler optimization on taint tracking

  8. Paper Writing • Read lots of papers while I was writing the related work section. • Taint tracking is a different field from sandboxing, CFI etc. • The paper is in good shape

  9. Next Step • Write the paper • Number collection

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