CVE-2017-8301

Severity: medium (CVSS 5.3 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-04-27 · updated 2026-06-17
Weakness: CWE-295

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.

Affected products

OpenBSD Libressl: 2.5.1, 2.5.2, 2.5.3

References

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
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

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