// For flags

CVE-2018-8970

 

Severity Score

7.4
*CVSS v3

Exploit Likelihood

< 1%
*EPSS

Affected Versions

1
*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

The int_x509_param_set_hosts function in lib/libcrypto/x509/x509_vpm.c in LibreSSL 2.7.0 before 2.7.1 does not support a certain special case of a zero name length, which causes silent omission of hostname verification, and consequently allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate. NOTE: the LibreSSL documentation indicates that this special case is supported, but the BoringSSL documentation does not.

La función int_x509_param_set_hosts en lib/libcrypto/x509/x509_vpm.c en LibreSSL, en versiones 2.7.0 anteriores a la 2.7.1 no soporta determinados casos especiales de una longitud de nombre cero. Esto provoca una omisión silenciosa de la verificación del nombre de host y, en consecuencia, permite que atacantes Man-in-the-Middle (MitM) suplanten servidores y obtengan información sensible mediante un certificado manipulado. NOTA: la documentación de LibreSSL indica que el programa soporta este caso especial, pero la documentación de BoringSSL no.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2018-03-24 CVE Reserved
  • 2018-03-24 CVE Published
  • 2018-03-25 First Exploit
  • 2024-08-05 CVE Updated
  • 2025-04-11 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-295: Improper Certificate Validation
CAPEC
Affected Vendors, Products, and Versions (1)