PT-2022-11915 · Envoy · Envoy

Mattklein123 · Published 2022-02-22 · Updated 2024-03-06 · CVE-2021-43826

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Envoy (affected versions not specified)

Description A crash occurs in Envoy when it is configured for upstream tunneling and the downstream connection disconnects while the upstream connection or HTTP/2 stream is still being established.

Recommendations Upgrade to a newer version to resolve the issue. At the moment, there is no information about a specific newer version that contains a fix for this vulnerability, but users are advised to upgrade.

Fix

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

BIT-ENVOY-2021-43826

CVE-2021-43826

GHSA-CMX3-FVGF-83MF

RHSA-2022:1275

RHSA-2022:1276

Affected Products

Envoy

References · 6

• https://github.com/envoyproxy/envoy/commit/ce0ae309057a216aba031aff81c445c90c6ef145 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2021-43826 · Security Note
• https://osv.dev/vulnerability/CVE-2021-43826 · Vendor Advisory
• https://osv.dev/vulnerability/BIT-envoy-2021-43826 · Vendor Advisory
• https://github.com/envoyproxy/envoy/security/advisories/GHSA-cmx3-fvgf-83mf · Note
• https://t.me/cibsecurity/37918 · Telegram Post