Vulnerability in OpenBSD Libressl
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 certificates by nginx.
Vulnerability class: Improper Certificate Validation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.010 (62.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 62.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000
Affected products
- OpenBSD Libressl — versions 2.5.1, 2.5.2, 2.5.3
Weakness classification (CWE)
References
- seclists.org/oss-sec/2017/q2/145 (Mailing List, Third Party Advisory)
- github.com/libressl-portable/portable/issues/307 (Patch, Third Party Advisory, Issue Tracking)
- trac.nginx.org/nginx/ticket/1257 (Patch, Third Party Advisory, Issue Tracking)
- www.securityfocus.com/bid/98076 (VDB Entry, Third Party Advisory, vdb-entry)
Frequently asked questions
- What is CVE-2017-8301?
- CVE-2017-8301 is a medium-severity vulnerability in OpenBSD Libressl, classified under Improper Certificate Validation. CVSS score: 5.3/10. Published 2017-04-27.
- How severe is CVE-2017-8301?
- Medium severity. CVSS v3 base score is 5.3 out of 10.