CVE-2021-44964
MEDIUM severity · CVSS 6.3 · Use-after-free
6.3CVSS MEDIUM
Summary
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.
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredNone
User interactionRequired
Confidentiality impactNone
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)1%
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Additional information
- NVD record
- http://lua-users.org/lists/lua-l/2021-11/msg00186.htmlAdvisory
- http://lua-users.org/lists/lua-l/2021-12/msg00007.htmlAdvisory
- http://lua-users.org/lists/lua-l/2021-12/msg00015.htmlAdvisory
- http://lua-users.org/lists/lua-l/2021-12/msg00030.htmlAdvisory
- https://github.com/Lua-Project/lua-5.4.4-sandbox-escape-with-new-vulnerabilityAdvisory