CVE-2021-31921

2021-05-1221:08:23

redhat.com

access.redhat.com

cve-2021-31921

istio

tls

authorization bypass

data confidentiality

integrity

system availability

CVSS2

6.8

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:P/I:P/A:P

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.003

Percentile

71.0%

JSON

An authorization bypass vulnerability was found in istio. When the istio gateway is configured with TLS mode AUTO_PASSTHROUGH, it is possible for a malicious user to bypass the authorization checks and gain access to protected services. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.