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Fencer Vulns
high 8.1

CVE-2019-7443 json

KDE KAuth before 5.55 allows the passing of parameters with arbitrary types to helpers running as root over DBus via DBusHelperProxy.cpp.

published 2019-05-07 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-16985

cvss
8.1
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.4%
EPSS 2.4% chance of exploitation in 30 days, percentile 83%
public exploits
0
none known

Summary

KDE KAuth before 5.55 allows the passing of parameters with arbitrary types to helpers running as root over DBus via DBusHelperProxy.cpp. Certain types can cause crashes, and trigger the decoding of arbitrary images with dynamically loaded plugins. In other words, KAuth unintentionally causes this plugin code to run as root, which increases the severity of any possible exploitation of a plugin vulnerability.

Patch / fix

  • kde kauth 5.55.0
  • kauth Debian 14, Debian 13, Debian 12 5.54.0-2

debian advisories DEBIAN-CVE-2019-7443

  • kauth Ubuntu Pro 16.04 LTS 5.18.0-0ubuntu2+esm1
  • kauth Ubuntu Pro 18.04 LTS 5.44.0-0ubuntu1+esm1

ubuntu advisories UBUNTU-CVE-2019-7443

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

  • kauth Package Hub 15 5.45.0-bp150.8.2
  • polkit-qt5-1 Package Hub 15 0.112.0-bp150.3.6.1
  • kauth Package Hub 15, Package Hub 12 SP3, Package Hub 12 SP2 +2 more 5.45.0-bp150.5.2
  • kcoreaddons Package Hub 15, Package Hub 12 SP3, Package Hub 12 SP2 +2 more 5.45.0-bp150.3.6.2
  • polkit-qt5-1 Package Hub 15, Package Hub 12 SP3, Package Hub 12 SP2 +2 more 0.112.0-5.2
  • extra-cmake-modules Package Hub 15, Package Hub 12 SP3, Package Hub 12 SP2 +2 more 5.32.0-7.2
  • kauth Package Hub 15 5.32.0-bp150.3.10.1
  • kcoreaddons Package Hub 15 5.32.0-bp150.3.3.1

opensuse advisories openSUSE-SU-2019:1277-1openSUSE-SU-2019:0242-1openSUSE-SU-2019:1051-1openSUSE-SU-2019:0247-1

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-2019-7443 updated cvss 7.8

kauth: insecure handling of arguments in helpers

  • 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

Exploit prediction

2.35% chance of exploitation in the next 30 days, higher than 83% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 8.1 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 9.3 AV:N/AC:M/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-20 Improper Input 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.