CVE-2021-44964: Use After Free

March 14, 2022 (updated March 21, 2022)

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.

References

lua-users.org/lists/lua-l/2021-11/msg00186.html
lua-users.org/lists/lua-l/2021-12/msg00007.html
lua-users.org/lists/lua-l/2021-12/msg00015.html
lua-users.org/lists/lua-l/2021-12/msg00030.html
github.com/Lua-Project/lua-5.4.4-sandbox-escape-with-new-vulnerability
nvd.nist.gov/vuln/detail/CVE-2021-44964

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