PT-2021-17903 · Envoy · Envoy

Mattklein123 + 1 · Published 2021-05-20 · Updated 2024-03-06 · CVE-2021-28683

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 versions prior to 1.71.1

Description: A remotely exploitable issue exists where a NULL pointer dereference and crash can occur in TLS when an unknown TLS alert code is received.

Recommendations: For versions prior to 1.71.1, update to a version that contains a fix for this issue to prevent remote exploitation.

Fix

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

BIT-ENVOY-2021-28683

CVE-2021-28683

GHSA-R22G-5F3X-XJGG

GHSA-XW4Q-6PJ2-5GFG

RHSA-2021:1322

RHSA-2021:1324

Affected Products

Envoy

References · 11

• https://nvd.nist.gov/vuln/detail/CVE-2021-28683 · Security Note
• https://linux.oracle.com/errata/ELSA-2021-9397.html · Vendor Advisory
• https://osv.dev/vulnerability/BIT-envoy-2021-28683 · Vendor Advisory
• https://blog.envoyproxy.io · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2021-9399.html · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2021-9396.html · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-28683 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2021-9398.html · Vendor Advisory
• https://github.com/envoyproxy/envoy/security/advisories/GHSA-r22g-5f3x-xjgg · Note
• https://github.com/envoyproxy/envoy/releases · Note
• https://github.com/envoyproxy/envoy/security/advisories/GHSA-xw4q-6pj2-5gfg · Note