Heap-Based Buffer Overflow in mrb_yield_with_class Function in mruby through 2.1.2-rc

Heap-Based Buffer Overflow in mrb_yield_with_class Function in mruby through 2.1.2-rc

CVE-2020-15866 · CRITICAL Severity

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

mruby through 2.1.2-rc has a heap-based buffer overflow in the mrb_yield_with_class function in vm.c because of incorrect VM stack handling. It can be triggered via the stack_copy function.

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