Bug 1996946 (CVE-2021-32778) - CVE-2021-32778 envoyproxy/envoy: excessive CPU usage when handling a large number of HTTP/2 requests
Summary: CVE-2021-32778 envoyproxy/envoy: excessive CPU usage when handling a large nu...
Keywords:
Status: NEW
Alias: CVE-2021-32778
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Nobody
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Blocks: 1996910
TreeView+ depends on / blocked
 
Reported: 2021-08-24 04:26 UTC by Mark Cooper
Modified: 2023-09-01 01:23 UTC (History)
3 users (show)

Fixed In Version: envoyproxy/envoy 1.19.1, envoyproxy/envoy 1.18.4, envoyproxy/envoy 1.17.4, envoyrproxy/envoy 1.16.5
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An uncontrolled resource consumption vulnerability was found in envoyproxy/envoy. When envoy handles a large number of HTTP/2 requests which open and then reset the connection, it can cause excessive CPU usage. This flaw allows an attacker to cause a denial of service on the proxy. The highest threat from this vulnerability is to system availability.
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Description Mark Cooper 2021-08-24 04:26:09 UTC 
Envoy proxy through 1.19.1 contains an excessive resources consumption vulnerability. When handling a large number of HTTP/2 requests during the opening and resetting of requests, this causes excessive CPU usage potentially resulting in a denial of service.
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