Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2019-15226

Severity CVSS v4.0:
Pending analysis
Type:
CWE-400 Uncontrolled Resource Consumption ('Resource Exhaustion')
Publication date:
09/10/2019
Last modified:
17/10/2019

Description

Upon receiving each incoming request header data, Envoy will iterate over existing request headers to verify that the total size of the headers stays below a maximum limit. The implementation in versions 1.10.0 through 1.11.1 for HTTP/1.x traffic and all versions of Envoy for HTTP/2 traffic had O(n^2) performance characteristics. A remote attacker may craft a request that stays below the maximum request header size but consists of many thousands of small headers to consume CPU and result in a denial-of-service attack.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
7.50
Severity 3.x
HIGH
Vector 2.0
AV:N/AC:L/Au:N/C:N/I:N/A:C CVSS v2.0 Severity and Metrics:

Base Score: 7.80 HIGH
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Complete

Base Score 2.0
7.80
Severity 2.0
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:envoyproxy:envoy:1.0.0:*:*:*:*:*:*:*
cpe:2.3:a:envoyproxy:envoy:1.1.0:*:*:*:*:*:*:*
cpe:2.3:a:envoyproxy:envoy:1.2.0:*:*:*:*:*:*:*
cpe:2.3:a:envoyproxy:envoy:1.3.0:*:*:*:*:*:*:*
cpe:2.3:a:envoyproxy:envoy:1.4.0:*:*:*:*:*:*:*
cpe:2.3:a:envoyproxy:envoy:1.5.0:*:*:*:*:*:*:*
cpe:2.3:a:envoyproxy:envoy:1.6.0:*:*:*:*:*:*:*
cpe:2.3:a:envoyproxy:envoy:1.7.0:*:*:*:*:*:*:*
cpe:2.3:a:envoyproxy:envoy:1.7.1:*:*:*:*:*:*:*
cpe:2.3:a:envoyproxy:envoy:1.8.0:*:*:*:*:*:*:*
cpe:2.3:a:envoyproxy:envoy:1.9.0:*:*:*:*:*:*:*
cpe:2.3:a:envoyproxy:envoy:1.9.1:*:*:*:*:*:*:*
cpe:2.3:a:envoyproxy:envoy:1.10.0:*:*:*:*:*:*:*
cpe:2.3:a:envoyproxy:envoy:1.11.0:*:*:*:*:*:*:*
cpe:2.3:a:envoyproxy:envoy:1.11.1:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools