Medium severity · published Mar 4, 2020
CVE-2020-8660
CNCF Envoy through 1.13.0 TLS inspector bypass
5.3
CVSS
0.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 49% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EN
Envoy · Envoyproxy
before 1.12.3; 1.13.0 before 1.13.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-8660
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-8660
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
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