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Fencer Vulns
high 7.4

CVE-2019-12098 json

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.

published 2019-05-15 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-3750

cvss
7.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.0%
EPSS 2.0% chance of exploitation in 30 days, percentile 80%
public exploits
0
none known

Summary

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.

Patch / fix

  • heimdal_project heimdal 7.6.0
  • heimdal Debian 14, Debian 13, Debian 12 7.5.0+dfsg-3

debian advisories DEBIAN-CVE-2019-12098

  • heimdal Ubuntu 18.04 LTS 7.5.0+dfsg-1ubuntu0.1
  • heimdal Ubuntu Pro 14.04 LTS 1.6~git20131207+dfsg-1ubuntu1.2+esm1
  • heimdal Ubuntu Pro 16.04 LTS 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1

ubuntu advisories UBUNTU-CVE-2019-12098

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libheimdal Package Hub 15 SP1 7.7.0-bp151.4.3.1
  • libheimdal Package Hub 15 7.7.0-bp150.2.3.1
  • libheimdal openSUSE Leap 15.1, openSUSE Leap 15.0 7.7.0-lp151.3.3.1

opensuse advisories openSUSE-SU-2019:1888-1openSUSE-SU-2019:1688-1openSUSE-SU-2019:1682-1

  • heimdal Alpine 3.10 7.5.0-r5
  • heimdal Alpine 3.7 7.4.0-r4
  • heimdal Alpine 3.8 7.5.0-r3
  • heimdal Alpine 3.9 7.5.0-r4

alpine advisories ALPINE-CVE-2019-12098

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-12098 updated cvss 3.8

heimdal: man-in-the-middle attack in function krb5_init_creds_step in lib/krb5/init_creds_pw.c

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
6 mo ago

Exploit prediction

1.97% chance of exploitation in the next 30 days, higher than 80% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
NVD 3.1 7.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CNA 3.1 7.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
NVD 2.0 5.8 AV:N/AC:M/Au:N/C:P/I:P/A:N

Classification

Weakness
  • CWE-295 Improper Certificate Validation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.