CVE-2020-8595 Information

Description

Istio versions 1.2.10 (End of Life) and prior 1.3 through 1.3.7 and 1.4 through 1.4.3 allows authentication bypass. The Authentication Policy exact-path matching logic can allow unauthorized access to HTTP paths even if they are configured to be only accessed after presenting a valid JWT token. For example an attacker can add a ? or character to a URI that would otherwise satisfy an exact-path match.

CVSS Vector

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

Reference

https://access.redhat.com/errata/RHSA-2020:0477 https://access.redhat.com/security/cve/cve-2020-8595 https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-8595 https://github.com/istio/istio/commits/master https://istio.io/news/security/ https://istio.io/news/security/istio-security-2020-001/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

LOW

Availability Impact

LOW

Base Score

LOW

Base Severity

7.3