CVE Vulnerabilities

CVE-2021-31920

Use of Incorrectly-Resolved Name or Reference

Published: May 27, 2021 | Modified: Jul 12, 2022
CVSS 3.x
6.5
MEDIUM
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS 2.x
4 MEDIUM
AV:N/AC:L/Au:S/C:P/I:N/A:N
RedHat/V2
RedHat/V3
Ubuntu

Istio before 1.8.6 and 1.9.x before 1.9.5 has a remotely exploitable vulnerability where an HTTP request path with multiple slashes or escaped slash characters (%2F or %5C) could potentially bypass an Istio authorization policy when path based authorization rules are used.

Weakness

The product uses a name or reference to access a resource, but the name/reference resolves to a resource that is outside of the intended control sphere.

Affected Software

Name Vendor Start Version End Version
Istio Istio * 1.8.6 (excluding)
Istio Istio 1.9.0 (including) 1.9.5 (excluding)

References