CVE-2020-8659

envoy: Excessive CPU and/or memory usage when proxying HTTP/1.1

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

CNCF Envoy through 1.13.0 may consume excessive amounts of memory when proxying HTTP/1.1 requests or responses with many small (i.e. 1 byte) chunks.

CNCF Envoy versiones hasta 1.13.0, puede consumir cantidades excesivas de memoria cuando se hace proxy a peticiones o respuestas HTTP/1.1 con muchos fragmentos pequeños (es decir, 1 byte).

A resource consumption vulnerability was found in the servicemesh-proxy in Envoy. An attacker could send specially crafted small HTTP/1.1 packets that, when processed, could cause excessive amounts of memory to be used, possibly degrading or crashing the application.

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 bypass 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

2020-02-06 CVE Reserved
2020-03-04 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
CWE-770: Allocation of Resources Without Limits or Throttling

CAPEC

References (6)

URL	Tag	Source
https://github.com/envoyproxy/envoy/security/advisories/GHSA-jwcm-4pwp-c2qv	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/05/msg00025.html	Mailing List
https://www.envoyproxy.io/docs/envoy/v1.13.1/intro/version_history	Release Notes

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://access.redhat.com/errata/RHSA-2020:0734	2022-09-30
https://access.redhat.com/security/cve/CVE-2020-8659	2020-03-05
https://bugzilla.redhat.com/show_bug.cgi?id=1802539	2020-03-05

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Cncf Search vendor "Cncf"		Envoy Search vendor "Cncf" for product "Envoy"				<= 1.13.0 Search vendor "Cncf" for product "Envoy" and version " <= 1.13.0"		-		Affected
Redhat Search vendor "Redhat"		Openshift Service Mesh Search vendor "Redhat" for product "Openshift Service Mesh"				1.0 Search vendor "Redhat" for product "Openshift Service Mesh" and version "1.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		Affected