5.3

CVE-2017-8301: openbsd libressl Improper Certificate Validation

CVSS: 5.3v3.0MediumModified
AliasesALPINE-CVE-2017-8301
Published 27-04-2017Last modified 05-08-2024
Open JSON

Vulnerability summary

CVE-2017-8301 is a medium (CVSS 5.3) Improper Certificate Validation vulnerability in openbsd libressl. EPSS estimates a 1.04% chance of exploitation in the next 30 days, higher than 63.4% of scored vulnerabilities.

Overall risk
21/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.0 (NVD)
EPSS score
1.04%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 27-04-2017
    PublishedVulnerability first disclosed.
  2. 05-08-2024
    Last modifiedVulnerability information updated.

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 metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

1.04%

Chance of exploitation in the next 30 days

Percentile

63%

Versus all other CVEs

30-day change

+0.02 pp

From 1.02% on 18-09-2026

18-09-202618-10-2026
EPSS score
1.04%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Alpine1 product
  • libressl< 2.5.3-r1
Openbsd1 product

2 vendors · 2 products

References

5 links