Home/CVE/An issue was discovered in Envoy through 1.71.1. There is a remotely exploitable NULL pointer dereference and crash in T
CVE

CVE-2021-28683

An issue was discovered in Envoy through 1.71.1. There is a remotely exploitable NULL pointer dereference and crash in T

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.

HIGH · CVSS 7.5 EPSS 0.00116
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-476NULL Pointer Dereference
▤

Affected Products & Versions

1
envoyproxy envoyall versions
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD20 May 2021 · 05:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

2
rhsaRHSA-2021:1324Important
rhsaRHSA-2021:1322Important
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://blog.envoyproxy.ioVendor Advisory
https://github.com/envoyproxy/envoy/releasesThird Party Advisory
https://github.com/envoyproxy/envoy/security/advisories/GHSA-r22g-5f3x-xjggNot ApplicableThird Party Advisory
https://github.com/envoyproxy/envoy/security/advisories/GHSA-xw4q-6pj2-5gfgThird Party Advisory
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