TI-2021-02336 Aliases CVE-2021-3336 GHSA-qfqh-45q8-8425

DoTls13CertificateVerify in tls13.c in wolfSSL before 4.7.0 does not cease processing for…

LOW 37CWE-295Published 2021-01-29 · Updated 2024-08-03

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: High
Impact type: Spoofing
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-295.

Summary

DoTls13CertificateVerify in tls13.c in wolfSSL before 4.7.0 does not cease processing for certain anomalous peer behavior (sending an ED22519, ED448, ECC, or RSA signature without the corresponding certificate). The client side is affected because man-in-the-middle attackers can impersonate TLS 1.3 servers.

Why it matters now

EPSS 0.00802 56th percentileScored 2026-11-08

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:wolfssl:wolfssl::::::::	before 4.7.0	Vulnerable	wolfSSL

cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:* Versions before 4.7.0 Vulnerable ·wolfSSL

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2021-3336
2026-10-03 Alias added: GHSA-qfqh-45q8-8425

References

Patch 1

https://github.com/wolfSSL/wolfssl/pull/3676

Advisory 1

https://www.wolfssl.com/docs/security-vulnerabilities

TI-2024-00830 SEGV and out of bounds memory read from malicious packet CVSS 3.1CRITICAL 9.1
TI-2022-18557 In wolfSSL before 5.5.1, malicious clients can cause a buffer overflow during a TLS 1.3… CVSS 3.1HIGH 7.5
TI-2025-10943 Potential DoS Vulnerability through Multiple KeyShareEntry with Same Group in TLS 1.3 ClientHello CVSS 4.0MEDIUM 6.3
TI-2017-09737 wolfSSL Bleichenbacher/ROBOT CVSS 3.0HIGH 7.5
TI-2019-08902 wolfSSL 4.0.0 has a Buffer Overflow in DoPreSharedKeys in tls13.c when a current identity… CVSS 3.1CRITICAL 9.8
TI-2017-02021 Improper certificate validation in wolfSSL CVSS 3.1CRITICAL 9.8

See all 150 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences