Public Key Mismatch Vulnerability in Go Crypto TLS Package
CVE-2021-34558

6.5MEDIUM

Key Information:

Vendor: Golang
Status: Go
Vendor: CVE Published:; 15 July 2021

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👾 Exploit Exists🟡 Public PoC

What is CVE-2021-34558?

The Go crypto/tls package prior to version 1.16.6 allows inadequate validation of the public key type in X.509 certificates during RSA key exchange. This shortcoming can enable a malicious TLS server to induce a panic in a TLS client, exposing applications to unexpected behaviors and potential denial of service. Users are advised to update to versions after 1.16.5 to mitigate this risk.

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Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

cve-2021-34558
Created by alexzorin