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Vulnerability record · CVE-2019-12098 · published 15 May 2019

CVE-2019-12098: Heimdal project heimdal improper certificate validation vulnerability

Heimdal Project · Heimdal

In the client side of Heimdal before 7.6.0, failure to verify anonymous PKINIT PA-PKINIT-KX key exchange permits a man-in-the-middle attack. This issue is in krb5_init_creds_step in lib/krb5/init_creds_pw.c.

7.4 CVSS 3.1 High EPSS 2.0% · top 20.4% CWE-295 · Improper certificate validation
7.4CVSS 3.1 base score, v2 5.8
2.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
5Affected product versions listed by NVD
22References
17 Jun 2026Last modified by NVD

Description

In the client side of Heimdal before 7.6.0, failure to verify anonymous PKINIT PA-PKINIT-KX key exchange permits a man-in-the-middle attack. This issue is in krb5_init_creds_step in lib/krb5/init_creds_pw.c.

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

Affected products

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

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00002.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00003.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00026.html Mailing ListThird Party Advisory
http://www.h5l.org/pipermail/heimdal-announce/2019-May/000009.html PatchVendor Advisory
https://github.com/heimdal/heimdal/commit/2f7f3d9960aa6ea21358bdf3687cee5149aa35cf PatchThird Party Advisory
https://github.com/heimdal/heimdal/compare/3e58559...bbafe72 PatchThird Party Advisory
https://github.com/heimdal/heimdal/releases/tag/heimdal-7.6.0 Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GIXEDVVMPD6ZAJSMI2EZ7FN
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SLXXIF4LOQEAEDAF4UGP2AO
https://seclists.org/bugtraq/2019/Jun/1 Mailing ListThird Party Advisory
https://www.debian.org/security/2019/dsa-4455 Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00002.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00003.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00026.html Mailing ListThird Party Advisory
http://www.h5l.org/pipermail/heimdal-announce/2019-May/000009.html PatchVendor Advisory
https://github.com/heimdal/heimdal/commit/2f7f3d9960aa6ea21358bdf3687cee5149aa35cf PatchThird Party Advisory
https://github.com/heimdal/heimdal/compare/3e58559...bbafe72 PatchThird Party Advisory
https://github.com/heimdal/heimdal/releases/tag/heimdal-7.6.0 Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GIXEDVVMPD6ZAJSMI2EZ7FN
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SLXXIF4LOQEAEDAF4UGP2AO
https://seclists.org/bugtraq/2019/Jun/1 Mailing ListThird Party Advisory
https://www.debian.org/security/2019/dsa-4455 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2019-12098), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.