Bug 1996943 (CVE-2021-32780)

Summary: CVE-2021-32780 envoyproxy/envoy: denial of service when receiving a GOAWAY frame followed by a SETTINGS frame
Product: [Other] Security Response Reporter: Mark Cooper <mcooper>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: jwendell, kconner, rcernich, security-response-team, twalsh
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Fixed In Version: envoyproxy/envoy 1.19.1, envoyproxy/envoy 1.18.4 Doc Type: If docs needed, set a value
Doc Text:
A vulnerability was found in envoyproxy/envoy, in which the application terminates abruptly. The error occurs when envoy receives a `GOAWAY` frame followed by a `SETTINGS` frame with the parameter `SETTING_MAX_CONCURRENT_STREAMS` to set 0. This flaw allows an attacker to cause a denial of service on the proxy. The highest threat from this vulnerability is to system availability.
Story Points: ---
Clone Of: Environment:
Last Closed: 2021-08-25 03:34:54 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On:    
Bug Blocks: 1996910    

Description Mark Cooper 2021-08-24 04:18:02 UTC
Envoy proxy 1.18 through 1.19.1 contains a denial of service vulnerability. If a service sends the `GO_AWAY` frame followed by a `SETTINGS` frame with the parameter `SETTING_MAX_CONCURRENT_STREAMS` to set 0, Envoy may terminate.

Comment 1 Product Security DevOps Team 2021-08-25 03:34:54 UTC
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):