CVE-2021-44964
MEDIUMCVSS 6.3/10EPSS 0.98%
Last modified
CVE-2021-44964 is a medium-severity vulnerability rated 6.3/10 on the CVSS scale. 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.. EPSS estimates a 0.98% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Lua | Lua | >= 5.4.0, <= 5.4.3 |
References
- http://lua-users.org/lists/lua-l/2021-11/msg00186.htmlExploit, Mailing List, Technical Description, Vendor Advisory
- http://lua-users.org/lists/lua-l/2021-12/msg00007.htmlExploit, Mailing List, Vendor Advisory
- http://lua-users.org/lists/lua-l/2021-12/msg00015.htmlMailing List, Vendor Advisory
- http://lua-users.org/lists/lua-l/2021-12/msg00030.htmlMailing List, Vendor Advisory
- https://github.com/Lua-Project/lua-5.4.4-sandbox-escape-with-new-vulnerabilityExploit, Third Party Advisory
- http://lua-users.org/lists/lua-l/2021-11/msg00186.htmlExploit, Mailing List, Technical Description, Vendor Advisory
- http://lua-users.org/lists/lua-l/2021-12/msg00007.htmlExploit, Mailing List, Vendor Advisory
- http://lua-users.org/lists/lua-l/2021-12/msg00015.htmlMailing List, Vendor Advisory
- http://lua-users.org/lists/lua-l/2021-12/msg00030.htmlMailing List, Vendor Advisory
- https://github.com/Lua-Project/lua-5.4.4-sandbox-escape-with-new-vulnerabilityExploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is 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.
How severe is CVE-2021-44964?
CVE-2021-44964 has a CVSS score of 6.3/10 (MEDIUM severity). The EPSS model estimates a 0.98% probability of exploitation in the next 30 days.
How do I fix CVE-2021-44964?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2021-44964?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST