CVE-2021-44647 Denial of service in n/a

What is CVE-2021-44647?

CVE-2021-44647 is a medium-severity denial of service vulnerability in Fedoraproject Fedora, published on 11 Jan 2022. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Lua v5.4.3 and above are affected by SEGV by type confusion in funcnamefromcode function in ldebug.c which can cause a local denial of service.

Weakness: CWE-843

Which versions are affected by CVE-2021-44647?

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-2021-44647?

Upgrade lua to 5.4.4 or later.

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-2021-44647 being exploited?

There is no known exploitation of CVE-2021-44647 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-41327, AZL-41797, AZL-9317, BIT-lua-2021-44647, DEBIAN-CVE-2021-44647, GHSA-wvx9-9phh-9j3h and 1 more.