CVE-2021-39204

Excessive CPU usage in Pomerium

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Pomerium is an open source identity-aware access proxy. Envoy, which Pomerium is based on, incorrectly handles resetting of HTTP/2 streams with excessive complexity. This can lead to high CPU utilization when a large number of streams are reset. This can result in a DoS condition. Pomerium versions 0.14.8 and 0.15.1 contain an upgraded envoy binary with this vulnerability patched.

Pomerium es un proxy de acceso de código abierto consciente de la identidad. Envoy, en el que es basado Pomerium, maneja inapropiadamente el restablecimiento de los flujos HTTP/2 con una complejidad excesiva. Esto puede conllevar a un alto uso de la CPU cuando es restablecido un gran número de flujos. Esto puede resultar en una condición de DoS. Las versiones 0.14.8 y 0.15.1 de Pomerium contienen un binario envoy actualizado con esta vulnerabilidad parcheada

*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

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-08-16 CVE Reserved
2021-09-09 CVE Published
2024-05-25 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-834: Excessive Iteration

CAPEC

References (3)

URL	Tag	Source
https://github.com/envoyproxy/envoy/security/advisories/GHSA-3xh3-33v5-chcc	Third Party Advisory
https://github.com/pomerium/pomerium/security/advisories/GHSA-5wjf-62hw-q78r	Third Party Advisory
https://groups.google.com/g/envoy-announce/c/5xBpsEZZDfE/m/wD05NZBbAgAJ	Not Applicable

URL	Date	SRC

URL	Date	SRC

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"				<= 1.16.4 Search vendor "Envoyproxy" for product "Envoy" and version " <= 1.16.4"		-		Affected
Envoyproxy Search vendor "Envoyproxy"		Envoy Search vendor "Envoyproxy" for product "Envoy"				>= 1.17.0 < 1.17.4 Search vendor "Envoyproxy" for product "Envoy" and version " >= 1.17.0 < 1.17.4"		-		Affected
Envoyproxy Search vendor "Envoyproxy"		Envoy Search vendor "Envoyproxy" for product "Envoy"				>= 1.18.0 < 1.18.4 Search vendor "Envoyproxy" for product "Envoy" and version " >= 1.18.0 < 1.18.4"		-		Affected
Envoyproxy Search vendor "Envoyproxy"		Envoy Search vendor "Envoyproxy" for product "Envoy"				1.19.0 Search vendor "Envoyproxy" for product "Envoy" and version "1.19.0"		-		Affected
Pomerium Search vendor "Pomerium"		Pomerium Search vendor "Pomerium" for product "Pomerium"				< 0.14.8 Search vendor "Pomerium" for product "Pomerium" and version " < 0.14.8"		-		Affected
Pomerium Search vendor "Pomerium"		Pomerium Search vendor "Pomerium" for product "Pomerium"				0.15.0 Search vendor "Pomerium" for product "Pomerium" and version "0.15.0"		-		Affected