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CVE-2021-28683

nvd nist
Published: May 20, 2021Modified: Jun 17, 2026

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7.5
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploitability: 3.9 / Impact: 3.6
Source: NVD

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.

Affected (2)

Products: Envoyproxy: Envoy
Envoyproxy
1 product
Envoy
Configuration A
2 vulnerable
Vulnerable SoftwareAffected Versions
Envoyproxy
Envoy
Version 1.16.2
Envoy
Version 1.17.1

Related CWEs

CWE-476
NULL Pointer Dereference
The product dereferences a pointer that it expects to be valid but is NULL.

References (7)

Source: cve@mitre.org
Vendor Advisory
Source: cve@mitre.org
Third Party Advisory
Source: cve@mitre.org
Not ApplicableThird Party Advisory
Source: nvd@nist.gov
Third Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Not ApplicableThird Party Advisory

Timeline

No history available yet.