// For flags

CVE-2021-3336

 

Severity Score

8.1
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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.

La función DoTls13CertificateVerify en el archivo tls13.c en wolfSSL versiones hasta 4.7.0, no detiene el procesamiento para determinados comportamientos anómalos de peers (mediante el envío de una firma ED22519, ED448, ECC o RSA sin el certificado correspondiente) El lado del cliente se ve afectado porque los atacantes "man-in-the-middle" pueden hacerse pasar por servidores TLS 1.3

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-01-28 CVE Reserved
  • 2021-01-29 CVE Published
  • 2023-10-14 EPSS Updated
  • 2024-08-03 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-295: Improper Certificate Validation
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Wolfssl
Search vendor "Wolfssl"
 Wolfssl
Search vendor "Wolfssl" for product "Wolfssl"
 < 4.7.0
Search vendor "Wolfssl" for product "Wolfssl" and version " < 4.7.0"
-
Affected