CVE-2021-31920

CVE Details

Release Date:	2021-05-27
Impact:	None	What is this?

Description

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.

See more information about CVE-2021-31920 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 metrics

Base Score:	6.5
Vector String:	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Version:	3.0
Attack Vector:	Network
Attack Complexity:	Low
Privileges Required:	Low
User Interaction:	None
Scope:	Unchanged
Confidentiality Impact:	High
Integrity Impact:	None
Availability Impact:	None

Errata information

Platform	Errata	Release Date
Oracle Linux version 7 (istio)	ELSA-2021-9397	2021-08-06
Oracle Linux version 7 (istio)	ELSA-2021-9399	2021-08-06
Oracle Linux version 7 (kubernetes)	ELSA-2021-9397	2021-08-06
Oracle Linux version 7 (kubernetes)	ELSA-2021-9399	2021-08-06
Oracle Linux version 7 (olcne)	ELSA-2021-9397	2021-08-06
Oracle Linux version 7 (olcne)	ELSA-2021-9399	2021-08-06
Oracle Linux version 8 (istio)	ELSA-2021-9396	2021-08-06
Oracle Linux version 8 (istio)	ELSA-2021-9398	2021-08-06
Oracle Linux version 8 (kubernetes)	ELSA-2021-9396	2021-08-06
Oracle Linux version 8 (kubernetes)	ELSA-2021-9398	2021-08-06
Oracle Linux version 8 (olcne)	ELSA-2021-9396	2021-08-06
Oracle Linux version 8 (olcne)	ELSA-2021-9398	2021-08-06