9.8
CRITICAL
CVE-2019-18802
"Envoy HTTP Header Whitewashing Vulnerability"
Description

An issue was discovered in Envoy 1.12.0. An untrusted remote client may send an HTTP header (such as Host) with whitespace after the header content. Envoy will treat "header-value " as a different string from "header-value" so for example with the Host header "example.com " one could bypass "example.com" matchers.

INFO

Published Date :

Dec. 13, 2019, 1:15 p.m.

Last Modified :

Nov. 7, 2023, 3:07 a.m.

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2019-18802 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Envoyproxy envoy
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-2019-18802.

URL Resource
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00034.html
https://blog.envoyproxy.io Product
https://github.com/envoyproxy/envoy/commits/master Patch
https://github.com/envoyproxy/envoy/security/advisories/GHSA-356m-vhw2-wcm4 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-2019-18802 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2019-18802 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
  • CWE Remap by [email protected]

    Aug. 24, 2020

    Action Type Old Value New Value
    Changed CWE CWE-119 NVD-CWE-noinfo
  • CVE Modified by [email protected]

    Mar. 25, 2020

    Action Type Old Value New Value
    Added Reference http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00034.html [No Types Assigned]
  • 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:P/I:P/A:P)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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-356m-vhw2-wcm4 No Types Assigned https://github.com/envoyproxy/envoy/security/advisories/GHSA-356m-vhw2-wcm4 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-119
    Added CPE Configuration OR *cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* versions up to (including) 1.12.1
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2019-18802 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-2019-18802 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.51 }} 0.16%

score

0.73806

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
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Scope
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Integrity
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