CVE-2017-8301 — MEDIUM (5.3)

Vulnerability 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 Score

5.3

MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

NONE

Integrity

HIGH

Availability

NONE

Affected Products

Vendor	Product	Versions
Openbsd	Libressl	2.5.1

Related Weaknesses (CWE)

CWE-295

References

http://seclists.org/oss-sec/2017/q2/145Mailing ListThird Party Advisory
http://www.securityfocus.com/bid/98076Third Party AdvisoryVDB Entry
https://github.com/libressl-portable/portable/issues/307Issue TrackingPatchThird Party Advisory
https://trac.nginx.org/nginx/ticket/1257Issue TrackingPatchThird Party Advisory
http://seclists.org/oss-sec/2017/q2/145Mailing ListThird Party Advisory
http://www.securityfocus.com/bid/98076Third Party AdvisoryVDB Entry
https://github.com/libressl-portable/portable/issues/307Issue TrackingPatchThird Party Advisory
https://trac.nginx.org/nginx/ticket/1257Issue TrackingPatchThird Party Advisory

FAQ

What is CVE-2017-8301?

CVE-2017-8301 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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...

How severe is CVE-2017-8301?

CVE-2017-8301 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2017-8301?

Check the references section above for vendor advisories and patch information. Affected products include: Openbsd Libressl.