// For flags

CVE-2020-12457

 

Severity Score

7.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

An issue was discovered in wolfSSL before 4.5.0. It mishandles the change_cipher_spec (CCS) message processing logic for TLS 1.3. If an attacker sends ChangeCipherSpec messages in a crafted way involving more than one in a row, the server becomes stuck in the ProcessReply() loop, i.e., a denial of service.

Se detectó un problema en wolfSSL versiones anteriores a 4.5.0. Maneja inapropiadamente la lógica de procesamiento de mensajes de change_cipher_spec (CCS) para TLS versión 1.3. Si un atacante envía mensajes ChangeCipherSpec de una manera diseñada involucrando a más de uno en una fila, el servidor se atasca en el bucle de la función ProcessReply(), es decir, una denegación de servicio.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2020-04-29 CVE Reserved
  • 2020-08-21 CVE Published
  • 2023-05-07 EPSS Updated
  • 2024-08-04 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')
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"
 < 4.5.0
Search vendor "Wolfssl" for product "Wolfssl" and version " < 4.5.0"
-
Affected