CVE-2020-8660

low-risk
Published 2020-03-04

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.

Do I need to act?

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0.03% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.3/10 Medium
NETWORK / LOW complexity

Affected Products (1)

Affected Vendors

Envoyproxy

References (6)

Third Party Advisory https://access.redhat.com/errata/RHSA-2020:0734
Third Party Advisory https://github.com/envoyproxy/envoy/security/advisories/GHSA-c4g8-7grc-5wvx
Vendor Advisory https://www.envoyproxy.io/docs/envoy/v1.13.1/intro/version_history
Third Party Advisory https://access.redhat.com/errata/RHSA-2020:0734
Third Party Advisory https://github.com/envoyproxy/envoy/security/advisories/GHSA-c4g8-7grc-5wvx
Vendor Advisory https://www.envoyproxy.io/docs/envoy/v1.13.1/intro/version_history
26
/ 100
low-risk
Severity 21/34 · High
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal