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: 7.5 [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]
CVE-ID: CVE-2020-15888
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Lua
Arch Linux
Arch Linux
How to mitigate CVE-2020-15888
Install updates from vendor's website.
Lua - addressed in versions 5.3.6, 5.4.1
External 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