// For flags

CVE-2024-5814

Unverifed Ciphersuite used on a client-side TLS1.3 Downgrade

Severity Score

5.1
*CVSS v4

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Attend
*SSVC
Descriptions

A malicious TLS1.2 server can force a TLS1.3 client with downgrade capability to use a ciphersuite that it did not agree to and achieve a successful connection. This is because, aside from the extensions, the client was skipping fully parsing the server hello. https://doi.org/10.46586/tches.v2024.i1.457-500

*Credits: Armin Najafabadi, Per Allansson
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
Active
System
Vulnerable | Subsequent
Confidentiality
Low
None
Integrity
None
None
Availability
None
None
Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
Active
System
Vulnerable | Subsequent
Confidentiality
Low
None
Integrity
None
None
Availability
None
None
* Common Vulnerability Scoring System
SSVC
  • Decision:Attend
Exploitation
None
Automatable
Yes
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2024-06-10 CVE Reserved
  • 2024-08-27 CVE Published
  • 2024-08-27 CVE Updated
  • 2024-08-28 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-284: Improper Access Control
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"
 <= 5.7.0
Search vendor "WolfSSL" for product "WolfSSL" and version " <= 5.7.0"
en
Affected