#VU68952 Heap-based buffer overflow in Lua - CVE-2022-33099

Vulnerability identifier: #VU68952

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-33099

CWE-ID: CWE-122

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Lua
Universal components / Libraries / Scripting languages

Vendor: Lua

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error in the luaG_runerror component. A remote attacker can send specially crafted data to the application, trigger a heap-based buffer overflow and perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Lua: 5.4.0 - 5.4.4

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External links
https://lua-users.org/lists/lua-l/2022-05/msg00073.html
https://lua-users.org/lists/lua-l/2022-05/msg00042.html
https://www.lua.org/bugs.html#Lua-stack%20overflow%20when%20C%20stack%20overflows%20while%20handling%20an%20error:~:text=Lua%2Dstack%20overflow%20when%20C%20stack%20overflows%20while%20handling%20an%20error
https://lua-users.org/lists/lua-l/2022-05/msg00035.html
https://github.com/lua/lua/commit/42d40581dd919fb134c07027ca1ce0844c670daf
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RJNJ66IFDUKWJJZXHGOLRGIA3HWWC36R/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UHYZOEFDVLVAD6EEP4CDW6DNONIVVHPA/

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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.