CVEvulnerability
CVE-2019-18802
9.8 CRITICAL
Official page ↗
- Status
- Modified
- Published
- 2019-12-13
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 7.5 HIGH — AV:N/AC:L/Au:N/C:P/I:P/A:P
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.
Affected configurations
• envoyproxy envoy (<= 1.12.1)
References
- http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00034.html lists.opensuse.org
- 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 groups.google.com
- http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00034.html lists.opensuse.org
- 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 groups.google.com