#VU45993 Input validation error in Lua - CVE-2020-24371

Vulnerability identifier: #VU45993

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-24371

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Lua
Universal components / Libraries / Scripting languages

Vendor: Lua

Description

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

lgc.c in Lua 5.4.0 mishandles the interaction between barriers and the sweep phase, leading to a memory access violation involving collectgarbage.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Lua: 5.4.0

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External links
https://github.com/lua/lua/commit/a6da1472c0c5e05ff249325f979531ad51533110
https://www.lua.org/bugs.html#5.4.0-9

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.