An exploitable out of bounds write vulnerability exists in the parsing of ELF Section Headers of Hopper Disassembler 3.11.20. A specially crafted ELF file can cause attacker controlled pointer arithmetic resulting in a partially controlled out of bounds write. An attacker can craft an ELF file with specific section headers to trigger this vulnerability.
https://www.talosintelligence.com/vulnerability_reports/TALOS-2016-0222