To speak to your MIPS vs x86 issue, they are different architectures, so it is not immediately obvious if x86 (or Ubuntu, given its ASLR, stack/heap protections, etc) is vulnerable. Regardless, it needs fixing.
To speak to your MIPS vs x86 issue, they are different architectures, so it is not immediately obvious if x86 (or Ubuntu, given its ASLR, stack/heap protections, etc) is vulnerable. Regardless, it needs fixing.