A lua5.3 security update has been released for Debian GNU/Linux 9 LTS to address a vulnerability where a negation overflow and segmentation fault could be triggered in getlocal and setlocal, as demonstrated by getlocal(3,2^31).

DLA 2381-1: lua5.3 security update

-------------------------------------------------------------------------
Debian LTS Advisory DLA-2381-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Roberto C. Sánchez
September 26, 2020   https://wiki.debian.org/LTS
-------------------------------------------------------------------------

Package : lua5.3
Version : 5.3.3-1+deb9u1
CVE ID : CVE-2020-24370

A vulnerability was discovered in lua5.3, a simple, extensible,
embeddable programming language whereby a a negation overflow and
segmentation fault could be triggered in getlocal and setlocal, as
demonstrated by getlocal(3,2^31).

For Debian 9 stretch, this problem has been fixed in version
5.3.3-1+deb9u1.

We recommend that you upgrade your lua5.3 packages.

For the detailed security status of lua5.3 please refer to
its security tracker page at:
  https://security-tracker.debian.org/tracker/lua5.3

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://wiki.debian.org/LTS