CVE-2021-30501 Denial of service in upx

What is CVE-2021-30501?

CVE-2021-30501 is a medium-severity denial of service vulnerability in Fedoraproject Fedora, published on 26 May 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

An assertion abort was found in upx MemBuffer::alloc() in mem.cpp, in version UPX 4.0.0. The flow allows attackers to cause a denial of service (abort) via a crafted file.

Weakness: CWE-617, CWE-20

Which versions are affected by CVE-2021-30501?

It affects 3 products.

Products include Fedoraproject Fedora, Redhat Enterprise Linux, Upx Upx.

How do I fix CVE-2021-30501?

Upgrade to a fixed version.

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-2021-30501 being exploited?

There is no known exploitation of CVE-2021-30501 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 DEBIAN-CVE-2021-30501, GHSA-88gh-wqj4-3fxr, UBUNTU-CVE-2021-30501.