CVE-2021-43826 — Use After Free in Envoy

CWE-416 — Use After Free4 documents4 sources
Severity
7.5HIGHNVD
EPSS
0.1%
top 73.73%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Github.com Pomerium PomeriumEnvoyproxy Envoy
Timeline
PublishedFeb 22
Latest updateMar 1

Description

Envoy is an open source edge and service proxy, designed for cloud-native applications. In affected versions of Envoy a crash occurs when configured for :ref:`upstream tunneling ` and the downstream connection disconnects while the the upstream connection or http/2 stream is still being established. There are no workarounds for this issue. Users are advised to upgrade.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages3 packages

▶NVDenvoyproxy/envoy1.19.0 — 1.19.3+3
▶CVEListV5envoyproxy/envoy>= 1.19.0, < 1.19.3, >= 1.20.0, < 1.20.2, >= 1.21.0, < 1.21.1+2

Patches

Patch: github.com ↗Patch: github.com ↗

🔴Vulnerability Details

2
OSV
Multiple security issues in Pomerium's embedded envoy↗2022-03-01
▶
GHSA
Multiple security issues in Pomerium's embedded envoy↗2022-03-01
▶

📋Vendor Advisories

1
Red Hat
envoy: Use-after-free when tunneling TCP over HTTP↗2022-02-22
▶
CVE-2021-43826 — Use After Free in Envoyproxy Envoy | cvebase