Here is a negation overflow in lua

Question

Here is a negation overflow in lua

Crispy-fried-chicken opened this issue a year ago · comments

CVE-2020-24370 is a security vulnerability in lua. Although the CVE decription in CVE-2020-24370 said that this CVE only affected lua 5.4.0, according to lua this CVE actually existed since lua 5.2. The root cause of this CVE is the negation overflow that occurs when you try to take the negative of 0x80000000. Thus, this CVE also exists in nodemcu-firmware in the file app/lua53/ldebug.c.
Maybe you should try to backport the fix to the lua in nodemcu-firmwaresince the original fix is for 5.4 and several functions need to be changed. I'd like to open a PR for that if necessary.

Philip Gladstone · Answer 1 · Mon Feb 05 2024 02:06:46 GMT+0800 (China Standard Time)

Please open a PR for that.

Yiheng Cao · Answer 2 · Mon Feb 05 2024 10:42:36 GMT+0800 (China Standard Time)

Please open a PR for that.

Sure, I've already opened, which is #3632, please check it, thank you!