CVE-2017-8301
LibreSSL 2.5.1 to 2.5.3 lacks TLS certificate verification if SSL_get_verify_result is relied...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2017-8301- CVSS 3.0
- 5.3 Medium
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N - CVSS 2.0
- 2.6 Low
AV:N/AC:H/Au:N/C:N/I:P/A:N - Weakness
- CWE-295
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2017-8301- Updated
- 2026-11-02
EUVDEUVD-2017-17262 No score
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.
- Record
EUVD-2017-17262- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-phvv-c9gw-v54h
LibreSSL 2.5.1 to 2.5.3 lacks TLS certificate verification if SSL_get_verify_result is relied...
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.
- Record
GHSA-phvv-c9gw-v54h- CVSS 3.0
- 5.3 Medium
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N - Weakness
- CWE-295
- Updated
- 2026-11-02
OSVALPINE-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.
- Record
ALPINE-CVE-2017-8301- CVSS 3.0
- 5.3 Medium
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N - Updated
- 2026-11-02
OSVBELL-CVE-2017-8301
CVE-2017-8301 does not affect BellSoft software
- Record
BELL-CVE-2017-8301- CVSS 3.0
- 5.3 Medium
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N - Updated
- 2026-11-02
OSV
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.
- Record
CVE-2017-8301- CVSS 3.0
- 5.3 Medium
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
libresslAlpine:v3.10 |
before 2.5.3-r1 | 2.5.3-r1 |
libresslAlpine:v3.11 |
before 2.5.3-r1 | 2.5.3-r1 |
libresslAlpine:v3.12 |
before 2.5.3-r1 | 2.5.3-r1 |
libresslAlpine:v3.13 |
before 2.5.3-r1 | 2.5.3-r1 |
libresslAlpine:v3.6 |
before 2.5.3-r1 | 2.5.3-r1 |
libresslAlpine:v3.7 |
before 2.5.3-r1 | 2.5.3-r1 |
libresslAlpine:v3.8 |
before 2.5.3-r1 | 2.5.3-r1 |
libresslAlpine:v3.9 |
before 2.5.3-r1 | 2.5.3-r1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2017-8301 is a medium vulnerability (CVSS 5.3) in Openbsd Libressl, published April 27, 2017. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.04%, the 64th percentile. Fixed in libressl 2.5.3-r1.
References
seclists.org/oss-sec/2017/q2/145
github.com/libressl-portable/portable/issues/307
trac.nginx.org/nginx/ticket/1257
securityfocus.com/bid/98076
nvd.nist.gov/vuln/detail/CVE-2017-8301
security.alpinelinux.org/vuln/CVE-2017-8301
docs.bell-sw.com/security/cves/CVE-2017-8301