CVE-2020-12604 Denial of service in n/a

What is CVE-2020-12604?

CVE-2020-12604 is a high-severity denial of service vulnerability in Envoyproxy Envoy, published on 1 Jul 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Envoy version 1.14.2, 1.13.2, 1.12.4 or earlier is susceptible to increased memory usage in the case where an HTTP/2 client requests a large payload but does not send enough window updates to consume the entire stream and does not reset the stream.

Weakness: CWE-401

Which versions are affected by CVE-2020-12604?

1 open source package ship an affected version, including envoy. It affects 1 product.

Products include Envoyproxy Envoy.

How do I fix CVE-2020-12604?

Upgrade envoy to a fixed version for your release line: 1.12.5, 1.13.3 or 1.14.3.

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-2020-12604 being exploited?

There is no known exploitation of CVE-2020-12604 in the wild and no public exploit code.

Other vulnerabilities in Envoyproxy Envoy

• CVE-2022-29226 Trivial authentication bypass in Envoy Critical 10.0
• CVE-2019-18801 Memory corruption in n/a Critical 9.8
• CVE-2019-18802 Security feature bypass in n/a Critical 9.8
• CVE-2020-35470 Information disclosure in n/a High 8.8
• CVE-2024-23324 Envoy ext auth can be bypassed when Proxy protocol filter sets invalid UTF-8 metadata High 8.6

All Envoyproxy Envoy vulnerabilities

Sources

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

Also known as BIT-envoy-2020-12604, GHSA-8hf8-8gvw-ggvx.