CVE-2020-12603

envoy: Resource exhaustion when proxying HTTP/2 requests or responses with small data frames

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Envoy version 1.14.2, 1.13.2, 1.12.4 or earlier may consume excessive amounts of memory when proxying HTTP/2 requests or responses with many small (i.e. 1 byte) data frames.

Envoy versiones 1.14.2, 1.13.2, 1.12.4 o anteriores, puede consumir cantidades excesivas de memoria al hacer proxy de peticiones o respuestas HTTP/2 con muchas tramas de datos pequeños (es decir, 1 byte)

A flaw was found in Envoy in versions through 1.14.1. An excessive amount of memory may be consumed when proxying HTTP/2 requests and responses that contain many small (e.g. 1 byte) data frames. The highest threat from this vulnerability is to system availability.

Red Hat OpenShift Service Mesh is Red Hat's distribution of the Istio service mesh project, tailored for installation into an on-premise OpenShift Container Platform installation. Issues addressed include a resource exhaustion vulnerability.

*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

2020-05-01 CVE Reserved
2020-07-01 CVE Published
2024-08-04 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-400: Uncontrolled Resource Consumption

CAPEC

References (4)

URL	Tag	Source
https://github.com/envoyproxy/envoy-setec/issues/80	Broken Link
https://github.com/envoyproxy/envoy/security/advisories/GHSA-pc38-4q6c-85p6	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://access.redhat.com/security/cve/CVE-2020-12603	2020-07-07
https://bugzilla.redhat.com/show_bug.cgi?id=1844251	2020-07-07

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"				<= 1.12.4 Search vendor "Envoyproxy" for product "Envoy" and version " <= 1.12.4"		-		Affected
Envoyproxy Search vendor "Envoyproxy"		Envoy Search vendor "Envoyproxy" for product "Envoy"				1.13.2 Search vendor "Envoyproxy" for product "Envoy" and version "1.13.2"		-		Affected
Envoyproxy Search vendor "Envoyproxy"		Envoy Search vendor "Envoyproxy" for product "Envoy"				1.14.2 Search vendor "Envoyproxy" for product "Envoy" and version "1.14.2"		-		Affected