CVE-2019-15226

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Upon receiving each incoming request header data, Envoy will iterate over existing request headers to verify that the total size of the headers stays below a maximum limit. The implementation in versions 1.10.0 through 1.11.1 for HTTP/1.x traffic and all versions of Envoy for HTTP/2 traffic had O(n^2) performance characteristics. A remote attacker may craft a request that stays below the maximum request header size but consists of many thousands of small headers to consume CPU and result in a denial-of-service attack.

Al recibir los datos de cada encabezado de petición entrante, Envoy iterará sobre los encabezados de petición existentes para comprobar que el tamaño total de los encabezados permanezca por debajo del límite máximo. La implementación en las versiones 1.10.0 hasta 1.11.1 para el tráfico HTTP/1.x y todas las versiones de Envoy para el tráfico HTTP/2 tenían características de rendimiento O(n^2). Un atacante remoto puede crear una petición que se mantenga por debajo del tamaño máximo del encabezado de la petición, pero que consista en muchos miles de encabezados pequeños para consumir la CPU y resultar en un ataque de denegación de servicio.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-08-19 CVE Reserved
2019-10-09 CVE Published
2024-08-05 CVE Updated
2024-10-02 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-400: Uncontrolled Resource Consumption

CAPEC

References (3)

URL	Tag	Source
https://github.com/envoyproxy/envoy/commits/master	Third Party Advisory
https://github.com/envoyproxy/envoy/issues/8520	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
https://github.com/envoyproxy/envoy/commit/afc39bea36fd436e54262f150c009e8d72db5014	2019-10-17

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Envoyproxy Search vendor "Envoyproxy"		Envoy Search vendor "Envoyproxy" for product "Envoy"				1.0.0 Search vendor "Envoyproxy" for product "Envoy" and version "1.0.0"		-		Affected
Envoyproxy Search vendor "Envoyproxy"		Envoy Search vendor "Envoyproxy" for product "Envoy"				1.1.0 Search vendor "Envoyproxy" for product "Envoy" and version "1.1.0"		-		Affected
Envoyproxy Search vendor "Envoyproxy"		Envoy Search vendor "Envoyproxy" for product "Envoy"				1.2.0 Search vendor "Envoyproxy" for product "Envoy" and version "1.2.0"		-		Affected
Envoyproxy Search vendor "Envoyproxy"		Envoy Search vendor "Envoyproxy" for product "Envoy"				1.3.0 Search vendor "Envoyproxy" for product "Envoy" and version "1.3.0"		-		Affected
Envoyproxy Search vendor "Envoyproxy"		Envoy Search vendor "Envoyproxy" for product "Envoy"				1.4.0 Search vendor "Envoyproxy" for product "Envoy" and version "1.4.0"		-		Affected
Envoyproxy Search vendor "Envoyproxy"		Envoy Search vendor "Envoyproxy" for product "Envoy"				1.5.0 Search vendor "Envoyproxy" for product "Envoy" and version "1.5.0"		-		Affected
Envoyproxy Search vendor "Envoyproxy"		Envoy Search vendor "Envoyproxy" for product "Envoy"				1.6.0 Search vendor "Envoyproxy" for product "Envoy" and version "1.6.0"		-		Affected
Envoyproxy Search vendor "Envoyproxy"		Envoy Search vendor "Envoyproxy" for product "Envoy"				1.7.0 Search vendor "Envoyproxy" for product "Envoy" and version "1.7.0"		-		Affected
Envoyproxy Search vendor "Envoyproxy"		Envoy Search vendor "Envoyproxy" for product "Envoy"				1.7.1 Search vendor "Envoyproxy" for product "Envoy" and version "1.7.1"		-		Affected
Envoyproxy Search vendor "Envoyproxy"		Envoy Search vendor "Envoyproxy" for product "Envoy"				1.8.0 Search vendor "Envoyproxy" for product "Envoy" and version "1.8.0"		-		Affected
Envoyproxy Search vendor "Envoyproxy"		Envoy Search vendor "Envoyproxy" for product "Envoy"				1.9.0 Search vendor "Envoyproxy" for product "Envoy" and version "1.9.0"		-		Affected
Envoyproxy Search vendor "Envoyproxy"		Envoy Search vendor "Envoyproxy" for product "Envoy"				1.9.1 Search vendor "Envoyproxy" for product "Envoy" and version "1.9.1"		-		Affected
Envoyproxy Search vendor "Envoyproxy"		Envoy Search vendor "Envoyproxy" for product "Envoy"				1.10.0 Search vendor "Envoyproxy" for product "Envoy" and version "1.10.0"		-		Affected
Envoyproxy Search vendor "Envoyproxy"		Envoy Search vendor "Envoyproxy" for product "Envoy"				1.11.0 Search vendor "Envoyproxy" for product "Envoy" and version "1.11.0"		-		Affected
Envoyproxy Search vendor "Envoyproxy"		Envoy Search vendor "Envoyproxy" for product "Envoy"				1.11.1 Search vendor "Envoyproxy" for product "Envoy" and version "1.11.1"		-		Affected
Envoyproxy Search vendor "Envoyproxy"		Envoy Search vendor "Envoyproxy" for product "Envoy"				1.11.2 Search vendor "Envoyproxy" for product "Envoy" and version "1.11.2"		-		Affected