CVE-2021-32780

CVE Details

Release Date:2021-08-24

Description


Envoy is an open source L7 proxy and communication bus designed for large modern service oriented architectures. In affected versions Envoy transitions a H/2 connection to the CLOSED state when it receives a GOAWAY frame without any streams outstanding. The connection state is transitioned to DRAINING when it receives a SETTING frame with the SETTINGS_MAX_CONCURRENT_STREAMS parameter set to 0. Receiving these two frames in the same I/O event results in abnormal termination of the Envoy process due to invalid state transition from CLOSED to DRAINING. A sequence of H/2 frames delivered by an untrusted upstream server will result in Denial of Service in the presence of untrusted **upstream** servers. Envoy versions 1.19.1, 1.18.4 contain fixes to stop processing of pending H/2 frames after connection transition to the CLOSED state.

See more information about CVE-2021-32780 from MITRE CVE dictionary and NIST NVD


CVSS v3.0 metrics


NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.

Base Score: 7.5 Base Metrics: AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Access Vector: Network Attack Complexity: Low
Privileges Required: None User Interaction: None
Scope: Unchanged Confidentiality Impact: None
Integrity Impact: None Availability Impact: High

Errata information


PlatformErrataRelease Date
Oracle Linux version 7 (istio)ELSA-2021-95252021-11-10
Oracle Linux version 7 (istio)ELSA-2021-95262021-11-09
Oracle Linux version 7 (kubernetes)ELSA-2021-95262021-11-09
Oracle Linux version 7 (olcne)ELSA-2021-95252021-11-10
Oracle Linux version 7 (olcne)ELSA-2021-95262021-11-09
Oracle Linux version 8 (istio)ELSA-2021-95252021-11-10
Oracle Linux version 8 (istio)ELSA-2021-95462021-11-09
Oracle Linux version 8 (kubernetes)ELSA-2021-95462021-11-09
Oracle Linux version 8 (olcne)ELSA-2021-95252021-11-10
Oracle Linux version 8 (olcne)ELSA-2021-95462021-11-09



This page is generated automatically and has not been checked for errors or omissions. For clarification or corrections please contact the Oracle Linux ULN team

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