CVE-2017-8301 Information

Description

LibreSSL 2.5.1 to 2.5.3 lacks TLS certificate verification if SSL_get_verify_result is relied upon for a later check of a verification result in a use case where a user-provided verification callback returns 1 as demonstrated by acceptance of invalid certificates by nginx.

CVSS Vector

CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N

Reference

http://seclists.org/oss-sec/2017/q2/145 http://www.securityfocus.com/bid/98076 https://github.com/libressl-portable/portable/issues/307 https://trac.nginx.org/nginx/ticket/1257

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

NONE

Base Severity

5.3