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CVE-2021-28683 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://blog.envoyproxy.io CVEVendor Advisory
https://github.com/envoyproxy/envoy/releases CVEThird Party Advisory
https://github.com/envoyproxy/envoy/security/advisories/GHSA-r22g-5f3x-xjgg CVENot ApplicableThird Party Advisory
https://blog.envoyproxy.io [email protected]Vendor Advisory
https://github.com/envoyproxy/envoy/releases [email protected]Third Party Advisory

see all 7 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-476NULL Pointer Dereference[email protected]

Affected Products

ProductVersions
envoyproxy envoy
1.16.2
1.17.1

CPE

  • cpe:2.3:a:envoyproxy:envoy:1.16.2:*:*:*:*:*:*:*
  • cpe:2.3:a:envoyproxy:envoy:1.17.1:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2021-28683
NVD Published Date:
May 20, 2021
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2021-28683 Details - Not Deferred