CVE-2021-43519 Denial of service in n/a

What is CVE-2021-43519?

CVE-2021-43519 is a medium-severity denial of service vulnerability in Fedoraproject Fedora, published on 9 Nov 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official 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.

Weakness: CWE-674

Which versions are affected by CVE-2021-43519?

1 open source package ship an affected version, including lua. It affects 2 products.

Products include Fedoraproject Fedora, Lua Lua.

How do I fix CVE-2021-43519?

Upgrade lua to a fixed version for your release line: 5.3.5 or 5.4.4.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2021-43519 being exploited?

There is no known exploitation of CVE-2021-43519 in the wild and no public exploit code.

Other vulnerabilities in Fedoraproject Fedora

• CVE-2024-4577 PHP-CGI OS Command Injection Exploited Critical 9.8
• CVE-2021-39226 Grafana Authentication Bypass Exploited Critical 9.8
• CVE-2019-5544 VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Exploited Critical 9.8
• CVE-2024-4947 Google Chromium V8 Type Confusion Exploited Critical 9.6
• CVE-2024-4671 Google Chromium Visuals Use-After-Free Exploited Critical 9.6

All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-41261, AZL-41445, AZL-41574, AZL-41866, AZL-6672, BIT-lua-2021-43519 and 4 more.