CVE-2020-8843

Severity Score

7.4

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An issue was discovered in Istio 1.3 through 1.3.6. Under certain circumstances, it is possible to bypass a specifically configured Mixer policy. Istio-proxy accepts the x-istio-attributes header at ingress that can be used to affect policy decisions when Mixer policy selectively applies to a source equal to ingress. To exploit this vulnerability, someone has to encode a source.uid in this header. This feature is disabled by default in Istio 1.3 and 1.4.

Se detectó un problema en Istio versiones 1.3 hasta 1.3.6. En determinadas circunstancias, es posible omitir una política Mixer configurada específicamente. Istio-proxy acepta el encabezado x-istio-attributes en la entrada que puede ser usado para afectar las decisiones de la política cuando la política Mixer se aplica selectivamente a una fuente igual a la entrada. Para explotar esta vulnerabilidad, alguien tiene que codificar un archivo source.uid en este encabezado. Esta funcionalidad está deshabilitada por defecto en Istio versiones 1.3 y 1.4.

*Credits: N/A

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-02-10 CVE Reserved
2020-02-14 CVE Published
2023-12-19 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-20: Improper Input Validation

CAPEC

References (3)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
https://github.com/istio/istio/commits/master	2020-02-19

URL	Date	SRC
https://istio.io/news/security	2020-02-19
https://istio.io/news/security/istio-security-2020-002	2020-02-19

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Istio Search vendor "Istio"		Istio Search vendor "Istio" for product "Istio"				>= 1.3.0 <= 1.3.6 Search vendor "Istio" for product "Istio" and version " >= 1.3.0 <= 1.3.6"		-		Affected