CVE-2021-43519

MEDIUM
Published Nov 9, 20214y ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Nov 9, 2021 4y ago
Last Modified Jun 17, 2026 2w ago

Description

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.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-674

Affected Products 3

VendorProductVersionRange
lualua*≥5.1.0  –  <5.3.5
lualua*≥5.4.0  –  <5.4.4
fedoraprojectfedora35any

References 4

  • lua-users.org http://lua-users.org/lists/lua-l/2021-10/msg00123.html
    ExploitMailing ListVendor Advisory
  • lua-users.org http://lua-users.org/lists/lua-l/2021-11/msg00015.html
    PatchVendor Advisory
  • lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/C7XHFYHGSZKL53VCLSJSAJ6VMFGAIXKO/
  • lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/P3EMGAQ5Y6GXJLY4K5DUOOEQT4MZ4J4F/

Remediation

  • lua-users.org http://lua-users.org/lists/lua-l/2021-11/msg00015.html
    PatchVendor Advisory