CVE-2021-44964 : Use after free in garbage collector and finalizer of lgc.c in Lua interpreter 5.

Use after free in garbage collector and finalizer of lgc.c in Lua interpreter 5.4.0~5.4.3 allows attackers to perform Sandbox Escape via a crafted script file.

Published 2022-03-14 15:15:09

Updated 2022-03-21 05:17:20

Source MITRE

View at NVD, CVE.org

Vulnerability category: Memory Corruption

Products affected by CVE-2021-44964

LUA » LUA
Versions from including (>=) 5.4.0 and up to, including, (<=) 5.4.3
cpe:2.3:a:lua:lua:*:*:*:*:*:*:*:*
Matching versions

Threat overview for CVE-2021-44964

Top countries where our scanners detected CVE-2021-44964

Top open port discovered on systems with this issue 80

IPs affected by CVE-2021-44964 2

Find out if you^* are affected by CVE-2021-44964!

^*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2021-44964

EPSS FAQ

0.07%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 33 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-44964

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
4.3	MEDIUM	AV:N/AC:M/Au:N/C:N/I:N/A:P	8.6	2.9	NIST
Access Vector: Network Access Complexity: Medium Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Partial
6.3	MEDIUM	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H	1.8	4.0	NIST
Attack Vector: Local Attack Complexity: Low Privileges Required: None User Interaction: Required Scope: Changed Confidentiality: None Integrity: None Availability: High

CWE ids for CVE-2021-44964

CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-44964

http://lua-users.org/lists/lua-l/2021-12/msg00007.html

Re: Crash Analysis: Finalizer Logic in singlestep function can lead to Sandbox Escape Exploit
Exploit;Mailing List;Vendor Advisory
http://lua-users.org/lists/lua-l/2021-12/msg00015.html

Re: Crash Analysis: Finalizer Logic in singlestep function can lead to Sandbox Escape Exploit
Mailing List;Vendor Advisory
http://lua-users.org/lists/lua-l/2021-11/msg00186.html

Crash Analysis: Finalizer Logic in singlestep function can lead to Sandbox Escape Exploit
Exploit;Mailing List;Technical Description;Vendor Advisory
https://github.com/Lua-Project/lua-5.4.4-sandbox-escape-with-new-vulnerability

GitHub - Lua-Project/lua-5.4.4-sandbox-escape-with-new-vulnerability
Exploit;Third Party Advisory
http://lua-users.org/lists/lua-l/2021-12/msg00030.html

Re: Crash Analysis: Finalizer Logic in singlestep function can lead to Sandbox Escape Exploit
Mailing List;Vendor Advisory