CVE-2020-8660 CNCF Envoy through 1.13.0 TLS inspector bypass.

What is CVE-2020-8660?

CVE-2020-8660 is a medium-severity vulnerability in Envoyproxy Envoy, published on 4 Mar 2020.

Official description

CNCF Envoy through 1.13.0 TLS inspector bypass. TLS inspector could have been bypassed (not recognized as a TLS client) by a client using only TLS 1.3. Because TLS extensions (SNI, ALPN) were not inspected, those connections might have been matched to a wrong filter chain, possibly bypassing some security restrictions in the process.

Weakness: CWE-345

Which versions are affected by CVE-2020-8660?

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

Products include Envoyproxy Envoy.

How do I fix CVE-2020-8660?

Upgrade envoy to a fixed version for your release line: 1.12.3 or 1.13.1.

Is CVE-2020-8660 being exploited?

There is no known exploitation of CVE-2020-8660 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-2020-8660, GHSA-c4g8-7grc-5wvx.