Vulnerability · Published May 20, 2021 · Assigned by mitre

CVE-2021-28683

High 7.5

In plain English

A high-severity security flaw in the affected software. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.7% (higher than 77% of all known vulnerabilities).

Severity (CVSS NVD)7.5High

Exploit odds (30 days)1.7%top 22.9% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official 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 products (as reported)

Vendor	Product	Versions
n/a	n/a	n/a

References

https://github.com/envoyproxy/envoy/releases x_refsource_MISC
https://blog.envoyproxy.io x_refsource_MISC
https://github.com/envoyproxy/envoy/security/advisories/GHSA-r22g-5f3x-xjgg x_refsource_MISC