What’s Vulnerable › Vulnerabilities

CVE-2019-12098

• Severity: high (CVSS 7.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-05-15 · updated 2026-06-17
• Weakness: CWE-295

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.

Affected products

• Debian Linux: 9.0
• Fedoraproject Fedora: 30, 31
• Heimdal Software Kerberos: before 7.6.0 — fixed in 7.6.0
• openSUSE Backports Sle: 15.0, 15.0-sp1
• openSUSE Leap: 15.0, 15.1, 42.3

How to fix

Upgrade to a fixed version: Heimdal Software Kerberos 7.6.0. Check the vendor advisory for mitigations.

References

• http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00002.html
• http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00003.html
• http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00026.html
• http://www.h5l.org/pipermail/heimdal-announce/2019-May/000009.html
• https://github.com/heimdal/heimdal/commit/2f7f3d9960aa6ea21358bdf3687cee5149aa35cf
• https://github.com/heimdal/heimdal/compare/3e58559...bbafe72
• https://github.com/heimdal/heimdal/releases/tag/heimdal-7.6.0
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GIXEDVVMPD6ZAJSMI2EZ7FNEIVNWE5PD/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SLXXIF4LOQEAEDAF4UGP2AO6WDNTDFUB/
• https://seclists.org/bugtraq/2019/Jun/1
• https://www.debian.org/security/2019/dsa-4455
• http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00002.html

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