Bug 835340 (CVE-2021-44964)

Summary:	<dev-lang/lua-5.4.4: UAF leading to sandbox escape
Product:	Gentoo Security	Reporter:	John Helmert III <ajak>
Component:	Vulnerabilities	Assignee:	Gentoo Security <security>
Status:	CONFIRMED ---
Severity:	normal	CC:	89q1r14hd, ajak, robbat2, williamh
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
URL:	https://github.com/Lua-Project/lua-5.4.4-sandbox-escape-with-new-vulnerability
Whiteboard:	B2 [ebuild]
Package list:		Runtime testing required:	---

Description John Helmert III archtester

2022-03-15 15:36:32 UTC

CVE-2021-44964:

Use after free in garbage collector and finalizer of lgc.c in Lua interpreter 5.4.0~5.4.3 allows attackers to perform Sandbox Escape via a crafted script file.

http://lua-users.org/lists/lua-l/2021-11/msg00186.html
http://lua-users.org/lists/lua-l/2021-12/msg00007.html
http://lua-users.org/lists/lua-l/2021-12/msg00015.html
http://lua-users.org/lists/lua-l/2021-12/msg00030.html

Can't tell if any patch exists or if one has made it into any release.

Comment 1 John Helmert III archtester

2022-10-14 02:45:21 UTC

Bunch of discussion about a patch, but none seems to have made it into lua.git

Comment 2 John Helmert III archtester

2024-02-10 05:55:13 UTC

We need to handle the earlier slots somehow.