CVE Vulnerability

CVE-2019-18838

An issue was discovered in Envoy 1.12.0. Upon receipt of a malformed HTTP request without a Host header, it sends an internally generated "Invalid request" response. This internally generated response is dispatched through the configured encoder filter chain before being sent to the client. An encoder filter that invokes route manager APIs that access a request's Host header causes a NULL pointer dereference, resulting in abnormal termination of the Envoy process.

5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

Scope

7.5 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://github.com/envoyproxy/envoy/commits/master Patch
https://blog.envoyproxy.io Product
https://github.com/envoyproxy/envoy/security/advisories/GHSA-f2rv-4w6x-rwhc Exploit Third Party Advisory
https://groups.google.com/forum/#!forum/envoy-users Mailing List Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*
Information

Published : 2019-12-13 01:15

Updated : 2019-12-18 08:57

NVD link : CVE-2019-18838

Mitre link : CVE-2019-18838

Products Affected
No products.
CWE
CWE-476