Arch Linux Security Advisory ASA-202010-5 ========================================= Severity: High Date : 2020-10-18 CVE-ID : CVE-2020-15888 CVE-2020-15889 Package : lua Type : arbitrary code execution Remote : Yes Link : https://security.archlinux.org/AVG-1207 Summary ======= The package lua before version 5.4.1-1 is vulnerable to arbitrary code execution. Resolution ========== Upgrade to 5.4.1-1. # pacman -Syu "lua>=5.4.1-1" The problems have been fixed upstream in version 5.4.1. Workaround ========== None. Description =========== - CVE-2020-15888 (arbitrary code execution) Lua through 5.4.0 mishandles the interaction between stack resizes and garbage collection, leading to a heap-based buffer overflow, heap-based buffer over-read, or use-after-free. - CVE-2020-15889 (arbitrary code execution) Lua through 5.4.0 has a getobjname heap-based buffer over-read because youngcollection in lgc.c uses markold for an insufficient number of list members. Impact ====== A remote attacker is capable of executing arbitrary code on the affected host. References ========== http://lua-users.org/lists/lua-l/2020-07/msg00053.html http://lua-users.org/lists/lua-l/2020-07/msg00054.html http://lua-users.org/lists/lua-l/2020-07/msg00071.html http://lua-users.org/lists/lua-l/2020-07/msg00079.html https://github.com/lua/lua/commit/6298903e35217ab69c279056f925fb72900ce0b7 https://github.com/lua/lua/commit/eb41999461b6f428186c55abd95f4ce1a76217d5 http://lua-users.org/lists/lua-l/2020-07/msg00078.html https://github.com/lua/lua/commit/127e7a6c8942b362aa3c6627f44d660a4fb75312 https://security.archlinux.org/CVE-2020-15888 https://security.archlinux.org/CVE-2020-15889