CVE-2021-28683 Information

Description

An issue was discovered in Envoy through 1.71.1. There is a remotely exploitable NULL pointer dereference and crash in TLS when an unknown TLS alert code is received.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Reference

https://github.com/envoyproxy/envoy/releases https://github.com/envoyproxy/envoy/security/advisories/GHSA-r22g-5f3x-xjgg https://blog.envoyproxy.io https://github.com/envoyproxy/envoy/security/advisories/GHSA-xw4q-6pj2-5gfg

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5