CVE-2020-8660

envoy: TLS inspector bypassc

Severity Score

5.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Una omisión del inspector TLS de CNCF Envoy versiones hasta 1.13.0. El inspector TLS podría haber sido omitido (no reconocido como cliente TLS) por un cliente que usa solo TLS versión 1.3. Debido a que las extensiones TLS (SNI, ALPN) no fueron inspeccionadas, esas conexiones podrían haber coincidido con una cadena de filtro errónea, posiblemente omitiendo algunas restricciones de seguridad en el proceso.

An access control bypass vulnerability was found in envoy. An attacker could send specially crafted packets over TLS v1.3 to possibly bypass security restrictions.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-02-06 CVE Reserved
2020-03-04 CVE Published
2024-01-07 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-345: Insufficient Verification of Data Authenticity
CWE-358: Improperly Implemented Security Check for Standard

CAPEC

References (5)

URL	Tag	Source
https://github.com/envoyproxy/envoy/security/advisories/GHSA-c4g8-7grc-5wvx	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://access.redhat.com/errata/RHSA-2020:0734	2020-07-13
https://www.envoyproxy.io/docs/envoy/v1.13.1/intro/version_history	2020-07-13
https://access.redhat.com/security/cve/CVE-2020-8660	2020-03-05
https://bugzilla.redhat.com/show_bug.cgi?id=1802545	2020-03-05

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Envoyproxy Search vendor "Envoyproxy"		Envoy Search vendor "Envoyproxy" for product "Envoy"				< 1.12.3 Search vendor "Envoyproxy" for product "Envoy" and version " < 1.12.3"		-		Affected
Envoyproxy Search vendor "Envoyproxy"		Envoy Search vendor "Envoyproxy" for product "Envoy"				>= 1.13.0 < 1.13.1 Search vendor "Envoyproxy" for product "Envoy" and version " >= 1.13.0 < 1.13.1"		-		Affected