CVE-2021-32780
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- 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
| Platform | Errata | Release Date |
| Oracle Linux version 7 (istio) | ELSA-2021-9525 | 2021-11-10 |
| Oracle Linux version 7 (istio) | ELSA-2021-9526 | 2021-11-09 |
| Oracle Linux version 7 (kubernetes) | ELSA-2021-9526 | 2021-11-09 |
| Oracle Linux version 7 (olcne) | ELSA-2021-9525 | 2021-11-10 |
| Oracle Linux version 7 (olcne) | ELSA-2021-9526 | 2021-11-09 |
| Oracle Linux version 8 (istio) | ELSA-2021-9525 | 2021-11-10 |
| Oracle Linux version 8 (istio) | ELSA-2021-9546 | 2021-11-09 |
| Oracle Linux version 8 (kubernetes) | ELSA-2021-9546 | 2021-11-09 |
| Oracle Linux version 8 (olcne) | ELSA-2021-9525 | 2021-11-10 |
| Oracle Linux version 8 (olcne) | ELSA-2021-9546 | 2021-11-09 |
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