CVEvulnerability
CVE-2019-18838
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2019-12-13
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS 2.0 ([email protected])
- 5.0 MEDIUM — AV:N/AC:L/Au:N/C:N/I:N/A:P
- Weaknesses
- CWE-476
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.
Affected configurations
• envoyproxy envoy (<= 1.12.1)
Related
Weakness · CWE (1)
- CWE-476 NULL Pointer Dereference weakness
References
- 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 groups.google.com
- 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 groups.google.com