Heap-based buffer overflow in Lua - CVE-2020-15888
Published: July 22, 2020 / Updated: October 18, 2020
Vulnerability identifier: #VU47700
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2020-15888
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Lua
Affected software:
Lua
Lua
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error during interaction between stack resizes and garbage collection in ldo.c file. A remote attacker can pass specially crafted data to the application, trigger heap-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
How to mitigate CVE-2020-15888
Install updates from vendor's website.
Sources
- 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