CVE-2021-32780

Katalog CVE

CVSS 7.5 · High EPSS 1,2%

Kerentanan Improper Check for Unusual or Exceptional Conditions pada envoyproxy envoy. Skor CVSS 3.1 7.5 (High) menurut NVD.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

24 Agustus 2021

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

7.5 (High), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-754: Improper Check for Unusual or Exceptional Conditions

EPSS (30 hari)

1,2% peluang dieksploitasi; lebih tinggi dari 68,1% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://www.envoyproxy.io/docs/envoy/v1.19.0/version_history/version_history advisory vendor
• https://github.com/envoyproxy/envoy/security/advisories/GHSA-j374-mjrw-vvp8 advisory pihak ketiga