CVE-2017-8301
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…
Does this matter?
Lower severity and a low EPSS score (1.04%). Track it; it rarely justifies an emergency change on its own.
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 3.0
- 5.3 MEDIUMCVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
- EPSS
- 1.04% probability · 64th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-295
- Affected
- openbsd/libressl
- Source
- cve@mitre.org
EPSS 1.0% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://seclists.org/oss-sec/2017/q2/145Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/98076Third Party Advisory, VDB Entry
- https://github.com/libressl-portable/portable/issues/307Issue Tracking, Patch, Third Party Advisory
- https://trac.nginx.org/nginx/ticket/1257Issue Tracking, Patch, Third Party Advisory
- http://seclists.org/oss-sec/2017/q2/145Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/98076Third Party Advisory, VDB Entry
- https://github.com/libressl-portable/portable/issues/307Issue Tracking, Patch, Third Party Advisory
- https://trac.nginx.org/nginx/ticket/1257Issue Tracking, Patch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.