CVE-2019-18802

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Source
https://cve.org/CVERecord?id=CVE-2019-18802
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2019-18802.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2019-18802
Downstream
Related
Published
2019-12-13T13:15:11.383Z
Modified
2026-04-16T00:04:33.122879398Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

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.

References

Affected packages

Git / github.com/envoyproxy/envoy

Affected ranges

Type
GIT
Repo
https://github.com/envoyproxy/envoy
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last affected
44f8c365a1f1798f0af776f6aa64279dc68f5666
Database specific 
{
    "cpe": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "1.12.1"
        }
    ],
    "source": "CPE_FIELD"
}

Affected versions

v1.*
v1.0.0
v1.1.0
v1.10.0
v1.11.0
v1.12.0
v1.12.1
v1.2.0
v1.3.0
v1.4.0
v1.5.0
v1.6.0
v1.7.0
v1.8.0
v1.9.0

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2019-18802.json"