CVE-2024-32976

Envoy can enter an endless loop while decompressing Brotli data with extra input

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Attend

*SSVC

Descriptions

Envoy is a cloud-native, open source edge and service proxy. Envoyproxy with a Brotli filter can get into an endless loop during decompression of Brotli data with extra input.

Envoy es un proxy de servicio y borde de código abierto, nativo de la nube. Envoyproxy con un filtro Brotli puede entrar en un bucle sin fin durante la descompresión de datos Brotli con entrada adicional.

A flaw was found in Envoy's Brotli decompressor. This flaw allows a remote, unauthenticated attacker to trigger an infinite loop, causing a denial of service.

*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:Attend

Exploitation

Poc

Automatable

Yes

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2024-04-22 CVE Reserved
2024-06-04 CVE Published
2024-09-03 CVE Updated
2024-09-03 First Exploit
2025-03-31 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-400: Uncontrolled Resource Consumption
CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')

CAPEC

References (3)

URL	Tag	Source

URL	Date	SRC
https://github.com/envoyproxy/envoy/security/advisories/GHSA-7wp5-c2vq-4f8m	2024-09-03

URL	Date	SRC

URL	Date	SRC
https://access.redhat.com/security/cve/CVE-2024-32976	2024-10-07
https://bugzilla.redhat.com/show_bug.cgi?id=2283145	2024-10-07

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"				>= 1.18.0 < 1.27.6 Search vendor "Envoyproxy" for product "Envoy" and version " >= 1.18.0 < 1.27.6"		-		Affected
Envoyproxy Search vendor "Envoyproxy"		Envoy Search vendor "Envoyproxy" for product "Envoy"				>= 1.28.0 < 1.28.4 Search vendor "Envoyproxy" for product "Envoy" and version " >= 1.28.0 < 1.28.4"		-		Affected
Envoyproxy Search vendor "Envoyproxy"		Envoy Search vendor "Envoyproxy" for product "Envoy"				>= 1.29.0 < 1.29.5 Search vendor "Envoyproxy" for product "Envoy" and version " >= 1.29.0 < 1.29.5"		-		Affected
Envoyproxy Search vendor "Envoyproxy"		Envoy Search vendor "Envoyproxy" for product "Envoy"				>= 1.30.0 < 1.30.2 Search vendor "Envoyproxy" for product "Envoy" and version " >= 1.30.0 < 1.30.2"		-		Affected