CVE-2021-3336
HIGH
8.1
CVSS Score
Published: January 29, 2021 at 04:58 AM UTC
Updated: June 17, 2026 at 04:04 AM UTC
1 product affected across 1 vendorwolfSSL
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Severity
HIGH8.1
Exploit prediction
EPSS 0.8%
Description
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.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (2)
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/wolfSSL/wolfssl/pull/3676x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://www.wolfssl.com/docs/security-vulnerabilitiesCVSS
- Attack Vector
- NETWORK
- Complexity
- HIGH
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-295
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