CVE-2020-8277 Uncontrolled Resource Consumption in node

What is CVE-2020-8277?

CVE-2020-8277 is a high-severity denial of service vulnerability in Fedoraproject Fedora, published on 19 Nov 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A Node.js application that allows an attacker to trigger a DNS request for a host of their choice could trigger a Denial of Service in versions < 15.2.1, < 14.15.1, and < 12.19.1 by getting the application to resolve a DNS record with a larger number of responses. This is fixed in 15.2.1, 14.15.1, and 12.19.1.

Weakness: CWE-400

Which versions are affected by CVE-2020-8277?

2 open source packages ship an affected version, including node and node-min. It affects 8 products.

Products include C-Ares Project C-Ares, Fedoraproject Fedora, Nodejs Node.js, Oracle Blockchain Platform, Oracle Graalvm, Oracle Jd Edwards Enterpriseone Tools and 2 more.

How do I fix CVE-2020-8277?

Upgrade node to a fixed version for your release line: 12.19.1, 14.15.1 or 15.2.1.

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-2020-8277 being exploited?

There is no known exploitation of CVE-2020-8277 in the wild and no public exploit code.

Public exploit code: 2 proofs of concept on GitHub.

Other vulnerabilities in Fedoraproject Fedora

• CVE-2022-4904 Memory corruption in c-ares High 8.6
• CVE-2023-32067 0-byte UDP payload DoS in c-ares High 7.5
• CVE-2023-31147 Insufficient randomness in generation of DNS query IDs in c-ares Medium 5.9
• CVE-2021-3672 Other in c-ares Medium 5.6
• CVE-2023-31130 Buffer Underwrite in ares_inet_net_pton() Medium 4.1

All Fedoraproject Fedora vulnerabilities

Sources

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

Also known as ALPINE-CVE-2020-8277, AZL-32281, BIT-node-2020-8277, BIT-node-min-2020-8277, CLEANSTART-2026-KV06293, CLEANSTART-2026-LV83462 and 8 more.