CVEvulnerability
CVE-2021-28683
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2021-05-20
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS 2.0 ([email protected])
- 5.0 MEDIUM — AV:N/AC:L/Au:N/C:N/I:N/A:P
- Weaknesses
- CWE-476
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 configurations
• envoyproxy envoy 1.16.2
• envoyproxy envoy 1.17.1
Related
Weakness · CWE (1)
- CWE-476 NULL Pointer Dereference weakness
References
- https://blog.envoyproxy.io Vendor Advisory
- https://github.com/envoyproxy/envoy/releases Third Party Advisory
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-r22g-5f3x-xjgg Not Applicable, Third Party Advisory
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-xw4q-6pj2-5gfg Third Party Advisory
- https://blog.envoyproxy.io Vendor Advisory
- https://github.com/envoyproxy/envoy/releases Third Party Advisory
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-r22g-5f3x-xjgg Not Applicable, Third Party Advisory