Vulnerability in Lua
CVE-2021-43519
Stack overflow in lua_resume of ldo.c in Lua Interpreter 5.1.0~5.4.4 allows attackers to perform a Denial of Service via a crafted script file.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.012 (67.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 67.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.012 · change: +0.001
Affected products
- Lua
- Fedoraproject Fedora — versions 35
Weakness classification (CWE)
Public proof-of-concept exploits
References
- lua-users.org/lists/lua-l/2021-10/msg00123.html (Exploit, Mailing List, Vendor Advisory)
- lua-users.org/lists/lua-l/2021-11/msg00015.html (Patch, Vendor Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
Frequently asked questions
- What is CVE-2021-43519?
- CVE-2021-43519 is a medium-severity vulnerability in Lua, classified under Uncontrolled Recursion. CVSS score: 5.5/10. Published 2021-11-09.
- How severe is CVE-2021-43519?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2021-43519 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.