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

CVSS Scores

NISTv3.1 7.5

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

* 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
2024-06-13 EPSS Updated
2024-09-03 CVE Updated
2024-09-03 First Exploit
---------- 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