Medium severity · published Mar 14, 2022
CVE-2021-44964
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
6.3
CVSS
1%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
None
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 62% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LU
Lua · Lua
5.4.0 through 5.4.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-44964
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-44964
Exploit
http://lua-users.org/lists/lua-l/2021-11/msg00186.html
Exploit
http://lua-users.org/lists/lua-l/2021-12/msg00007.html
Mailing List
http://lua-users.org/lists/lua-l/2021-12/msg00015.html
Mailing List
http://lua-users.org/lists/lua-l/2021-12/msg00030.html
Exploit
https://github.com/Lua-Project/lua-5.4.4-sandbox-escape-with-new-vulnerability
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