Vulnerability Monitor

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CVE-2019-18838

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.

Published

2019-12-13T13:15:11.443

Last Modified

2024-11-21T04:33:41.103

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Primary
CWE-476

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	envoyproxy	envoy	≤ 1.12.1	Yes

References

https://blog.envoyproxy.io Product ([email protected])
https://github.com/envoyproxy/envoy/commits/master Patch ([email protected])
https://github.com/envoyproxy/envoy/security/advisories/GHSA-f2rv-4w6x-rwhc Exploit, Third Party Advisory ([email protected])
https://groups.google.com/forum/#%21forum/envoy-users ([email protected])
https://blog.envoyproxy.io Product (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/envoyproxy/envoy/commits/master Patch (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/envoyproxy/envoy/security/advisories/GHSA-f2rv-4w6x-rwhc Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://groups.google.com/forum/#%21forum/envoy-users (af854a3a-2127-422b-91ae-364da2661108)