TLS 1.3 Vulnerability in wolfSSL Affects Secure Connections
CVE-2021-3336

8.1HIGH

Key Information:

Vendor

Wolfssl

Status
Wolfssl
Vendor
CVE Published:
29 January 2021

What is CVE-2021-3336?

In wolfSSL versions prior to 4.7.0, the DoTls13CertificateVerify function in tls13.c fails to properly handle certain anomalous behaviors from peers. Specifically, it does not halt processing when a client sends an ED25519, ED448, ECC, or RSA signature without the corresponding certificate. This oversight exposes the client to potential impersonation attacks by man-in-the-middle attackers targeting TLS 1.3 connections.

References

https://github.com/wolfSSL/wolfssl/pull/3676
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https://www.wolfssl.com/docs/security-vulnerabilities
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CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.