CVE-2019-18838
Vulnerability Title: Envoy HTTP Request Handler NULL Pointer Dereference
Description
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.
INFO
Published Date :
Dec. 13, 2019, 1:15 p.m.
Last Modified :
Nov. 7, 2023, 3:07 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2019-18838.
| URL | Resource |
|---|---|
| https://blog.envoyproxy.io | Product |
| https://github.com/envoyproxy/envoy/commits/master | Patch |
| https://github.com/envoyproxy/envoy/security/advisories/GHSA-f2rv-4w6x-rwhc | Exploit Third Party Advisory |
| https://groups.google.com/forum/#%21forum/envoy-users |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2019-18838 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2019-18838 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Added Reference MITRE https://groups.google.com/forum/#%21forum/envoy-users [No types assigned] Removed Reference MITRE https://groups.google.com/forum/#!forum/envoy-users -
Initial Analysis by [email protected]
Dec. 18, 2019
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:N/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://blog.envoyproxy.io No Types Assigned https://blog.envoyproxy.io Product Changed Reference Type https://github.com/envoyproxy/envoy/commits/master No Types Assigned https://github.com/envoyproxy/envoy/commits/master Patch Changed Reference Type https://github.com/envoyproxy/envoy/security/advisories/GHSA-f2rv-4w6x-rwhc No Types Assigned https://github.com/envoyproxy/envoy/security/advisories/GHSA-f2rv-4w6x-rwhc Exploit, Third Party Advisory Changed Reference Type https://groups.google.com/forum/#!forum/envoy-users No Types Assigned https://groups.google.com/forum/#!forum/envoy-users Mailing List, Third Party Advisory Added CWE NIST CWE-476 Added CPE Configuration OR *cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* versions up to (including) 1.12.1
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2019-18838 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2019-18838
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.40 }} 0.13%
score
0.70445
percentile