CVE-2017-8301

MEDIUM

Openbsd Libressl - Improper Certificate Validation

Title source: rule

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.

References (4)

[Mailing List, Third Party Advisory] http://seclists.org/oss-sec/2017/q2/145

[Third Party Advisory, VDB Entry] http://www.securityfocus.com/bid/98076

[Issue Tracking, Patch, Third Party Advisory] https://github.com/libressl-portable/portable/issues/307

[Issue Tracking, Patch, Third Party Advisory] https://trac.nginx.org/nginx/ticket/1257

Scores

CVSS v3 5.3

EPSS 0.0021

EPSS Percentile 42.9%

Attack Vector NETWORK

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

Classification

CWE

CWE-295

Status published

Affected Products (4)

openbsd/libressl

openbsd/libressl

openbsd/libressl

n/a/n/a

Timeline

Published Apr 27, 2017

Tracked Since Feb 18, 2026