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Vulnerability record · CVE-2017-6594 · published 28 August 2017

CVE-2017-6594: Heimdal project heimdal improper certificate validation vulnerability

Heimdal Project · Heimdal

The transit path validation code in Heimdal before 7.3 might allow attackers to bypass the capath policy protection mechanism by leveraging failure to add the previous hop realm to the transit path of issued tickets.

7.5 CVSS 3.1 High EPSS 1.8% · top 22.9% CWE-295 · Improper certificate validation
7.5CVSS 3.1 base score, v2 5.0
1.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

Description

The transit path validation code in Heimdal before 7.3 might allow attackers to bypass the capath policy protection mechanism by leveraging failure to add the previous hop realm to the transit path of issued tickets.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.opensuse.org/opensuse-updates/2017-08/msg00062.html Third Party Advisory
http://www.h5l.org/advisories.html?show=2017-04-13 Vendor Advisory
https://github.com/heimdal/heimdal/commit/b1e699103f08d6a0ca46a122193c9da65f6cf837 Issue TrackingPatchThird Party Advisory
https://github.com/heimdal/heimdal/releases/tag/heimdal-7.3.0 Issue TrackingPatchThird Party Advisory
http://lists.opensuse.org/opensuse-updates/2017-08/msg00062.html Third Party Advisory
http://www.h5l.org/advisories.html?show=2017-04-13 Vendor Advisory
https://github.com/heimdal/heimdal/commit/b1e699103f08d6a0ca46a122193c9da65f6cf837 Issue TrackingPatchThird Party Advisory
https://github.com/heimdal/heimdal/releases/tag/heimdal-7.3.0 Issue TrackingPatchThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2017-6594), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.