Bug 1770713 (CVE-2019-18836) - CVE-2019-18836 envoy: excessive iteration due to listener filter timeout leads to DoS
Summary: CVE-2019-18836 envoy: excessive iteration due to listener filter timeout lead...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2019-18836
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks: 1773455
TreeView+ depends on / blocked
 
Reported: 2019-11-11 08:49 UTC by Marian Rehak
Modified: 2021-02-16 21:05 UTC (History)
3 users (show)

Fixed In Version: envoy 1.12.1
Clone Of:
Environment:
Last Closed: 2019-11-26 13:04:53 UTC
Embargoed:

Attachments (Terms of Use)

Description Marian Rehak 2019-11-11 08:49:48 UTC 
An attacker can create a TCP connection to listeners configured with `continue_on_listener_filters_timeout` true, wait for Envoy hitting the listener timeout and burn 1 core for the worker thread.
Comment 1 Marian Rehak 2019-11-11 08:50:27 UTC 
Upstream issue:

https://github.com/envoyproxy/envoy/security/advisories/GHSA-3xvf-4396-cj46

Upstream Fix:

https://github.com/envoyproxy/envoy/commit/c8de199e2971f79cbcbc6b5eadc8c566b28705d1
Comment 2 Marian Rehak 2019-11-11 08:51:49 UTC 
This issue doesn't affect Envoy versions < 1.12.0.
Comment 3 Product Security DevOps Team 2019-11-26 13:04:53 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2019-18836
Comment 4 Eric Christensen 2020-05-05 13:44:15 UTC 
External References:

https://github.com/envoyproxy/envoy/security/advisories/GHSA-3xvf-4396-cj46
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