An issue was discovered in mjs (mJS: Restricted JavaScript engine), ES6 (JavaScript version 6). There is Integer overflow in gc_compact_strings() in mjs.c.
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
| Link | Tags |
|---|---|
| https://github.com/cesanta/mjs/issues/159 | issue tracking patch exploit third party advisory |
| https://gist.github.com/Clingto/bb632c0c463f4b2c97e4f65f751c5e6d | third party advisory |