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Fencer Intel
medium 5.5

CVE-2019-6454 json

An issue was discovered in sd-bus in systemd 239.

published 7y ago modified 4mo ago also EUVD-2019-16014

cvss
5.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.0%
EPSS 2.0% chance of exploitation in 30 days, percentile 81%
public exploits
0
none known

Summary

An issue was discovered in sd-bus in systemd 239. bus_process_object() in libsystemd/sd-bus/bus-objects.c allocates a variable-length stack buffer for temporarily storing the object path of incoming D-Bus messages. An unprivileged local user can exploit this by sending a specially crafted message to PID1, causing the stack pointer to jump over the stack guard pages into an unmapped memory region and trigger a denial of service (systemd PID1 crash and kernel panic).

Patch / fix

  • mcafee web_gateway 7.7.2.21, 7.8.2.8, 8.1.1
  • systemd Debian 14, Debian 13, Debian 12 240-6

debian advisories DEBIAN-CVE-2019-6454

  • systemd Ubuntu 16.04 LTS 229-4ubuntu21.16
  • systemd Ubuntu 18.04 LTS 237-3ubuntu10.13

ubuntu advisories UBUNTU-CVE-2019-6454

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

  • systemd RHEL 8 239-13.el8_0.3
  • systemd-pam RHEL 8 239-13.el8_0.3
  • systemd-libs RHEL 8 239-13.el8_0.3
  • systemd-udev RHEL 8 239-13.el8_0.3
  • systemd-tests RHEL 8 239-13.el8_0.3
  • systemd-container RHEL 8 239-13.el8_0.3
  • systemd-journal-remote RHEL 8 239-13.el8_0.3
  • systemd RHEL 7 219-62.el7_6.5

red hat advisories RHSA-2019:2805RHSA-2019:1502RHSA-2019:1322RHSA-2019:0990RHSA-2019:0368RHSA-2019:0461

  • systemd SLE Module for Basesystem 15 SP1, SLE Module for Basesystem 15 234-24.30.1
  • systemd SLES for SAP 12 SP4, SLES for SAP 12 SP3, SLES for SAP 12 SP2 +10 more 228-150.66.4
  • systemd SLES for SAP 12 SP4, SLES for SAP 12 SP3, SLES for SAP 12 SP2 +10 more 228-150.63.1
  • systemd SLE Module for Basesystem 15 234-24.25.1
  • systemd SLES for SAP 12 SP1, SLES 12 SP1-LTSS 210-116.22.1
  • systemd SLES 12-LTSS 210-70.77.1

suse advisories SUSE-SU-2019:1364-2SUSE-SU-2019:1364-1SUSE-SU-2019:1265-1SUSE-SU-2019:0425-2SUSE-SU-2019:0428-1SUSE-SU-2019:0426-1

  • systemd openSUSE Tumbleweed 249.4-2.2
  • systemd openSUSE Leap 15.0 234-lp150.20.15.1
  • systemd-mini openSUSE Leap 15.0 234-lp150.20.15.1

opensuse advisories openSUSE-SU-2024:11420-1openSUSE-SU-2019:0255-1

  • systemd Arch Linux 241.7-1

arch linux advisories AVG-906

Is CVE-2019-6454 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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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-2019-6454 updated cvss 7.0

systemd: Insufficient input validation in bus_process_object() resulting in PID 1 crash

  • Red Hat Enterprise Linux BaseOS (v. 8) systemd 239-13.el8_0.3, systemd-pam 239-13.el8_0.3, systemd-libs 239-13.el8_0.3, systemd-udev 239-13.el8_0.3, systemd-tests 239-13.el8_0.3, systemd-container 239-13.el8_0.3, +1 more
    fixed: vendor fix RHSA-2019:0990
  • Red Hat Enterprise Linux Client (v. 7) systemd 219-62.el7_6.5, libgudev1 219-62.el7_6.5, systemd-libs 219-62.el7_6.5, systemd-sysv 219-62.el7_6.5, systemd-python 219-62.el7_6.5 Red Hat Enterprise Linux Client Optional (v. 7) systemd-networkd 219-62.el7_6.5, systemd-resolved 219-62.el7_6.5, systemd-journal-gateway 219-62.el7_6.5 Red Hat Enterprise Linux ComputeNode (v. 7) systemd 219-62.el7_6.5, libgudev1 219-62.el7_6.5, systemd-libs 219-62.el7_6.5, systemd-sysv 219-62.el7_6.5, systemd-python 219-62.el7_6.5
    fixed: vendor fix RHSA-2019:0368
  • Red Hat Enterprise Linux ComputeNode EUS (v. 7.4) systemd 219-42.el7_4.16, libgudev1 219-42.el7_4.16, systemd-libs 219-42.el7_4.16, systemd-sysv 219-42.el7_4.16, systemd-python 219-42.el7_4.16
    fixed: vendor fix RHSA-2019:1502
  • Red Hat Enterprise Linux ComputeNode EUS (v. 7.5) systemd 219-57.el7_5.6, libgudev1 219-57.el7_5.6, systemd-libs 219-57.el7_5.6, systemd-sysv 219-57.el7_5.6, systemd-python 219-57.el7_5.6
    fixed: vendor fix RHSA-2019:1322
  • Red Hat Enterprise Linux ComputeNode Optional (v. 7) systemd-networkd 219-62.el7_6.5, systemd-resolved 219-62.el7_6.5, systemd-journal-gateway 219-62.el7_6.5
    fixed: vendor fix RHSA-2019:0368
  • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.4) systemd-networkd 219-42.el7_4.16, systemd-resolved 219-42.el7_4.16, systemd-journal-gateway 219-42.el7_4.16
    fixed: vendor fix RHSA-2019:1502
  • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.5) systemd-networkd 219-57.el7_5.6, systemd-resolved 219-57.el7_5.6, systemd-journal-gateway 219-57.el7_5.6
    fixed: vendor fix RHSA-2019:1322
  • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) systemd 219-62.el7_6.5, libgudev1 219-62.el7_6.5, systemd-libs 219-62.el7_6.5, systemd-sysv 219-62.el7_6.5, systemd-python 219-62.el7_6.5 Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) systemd-networkd 219-62.el7_6.5, systemd-resolved 219-62.el7_6.5, systemd-journal-gateway 219-62.el7_6.5 Red Hat Enterprise Linux Server (v. 7) systemd 219-62.el7_6.5, libgudev1 219-62.el7_6.5, systemd-libs 219-62.el7_6.5, systemd-sysv 219-62.el7_6.5, systemd-python 219-62.el7_6.5
    fixed: vendor fix RHSA-2019:0368
show 11 more
  • Red Hat Enterprise Linux Server AUS (v. 7.3) systemd 219-30.el7_3.14, libgudev1 219-30.el7_3.14, systemd-libs 219-30.el7_3.14, systemd-sysv 219-30.el7_3.14, systemd-python 219-30.el7_3.14 Red Hat Enterprise Linux Server E4S (v. 7.3) systemd 219-30.el7_3.14, libgudev1 219-30.el7_3.14, systemd-libs 219-30.el7_3.14, systemd-sysv 219-30.el7_3.14, systemd-python 219-30.el7_3.14
    fixed: vendor fix RHSA-2019:2805
  • Red Hat Enterprise Linux Server EUS (v. 7.4) systemd 219-42.el7_4.16, libgudev1 219-42.el7_4.16, systemd-libs 219-42.el7_4.16, systemd-sysv 219-42.el7_4.16, systemd-python 219-42.el7_4.16
    fixed: vendor fix RHSA-2019:1502
  • Red Hat Enterprise Linux Server EUS (v. 7.5) systemd 219-57.el7_5.6, libgudev1 219-57.el7_5.6, systemd-libs 219-57.el7_5.6, systemd-sysv 219-57.el7_5.6, systemd-python 219-57.el7_5.6
    fixed: vendor fix RHSA-2019:1322
  • Red Hat Enterprise Linux Server Optional (v. 7) systemd-networkd 219-62.el7_6.5, systemd-resolved 219-62.el7_6.5, systemd-journal-gateway 219-62.el7_6.5
    fixed: vendor fix RHSA-2019:0368
  • Red Hat Enterprise Linux Server Optional AUS (v. 7.3) systemd-networkd 219-30.el7_3.14, systemd-resolved 219-30.el7_3.14, systemd-journal-gateway 219-30.el7_3.14 Red Hat Enterprise Linux Server Optional E4S (v. 7.3) systemd-networkd 219-30.el7_3.14, systemd-resolved 219-30.el7_3.14, systemd-journal-gateway 219-30.el7_3.14
    fixed: vendor fix RHSA-2019:2805
  • Red Hat Enterprise Linux Server Optional EUS (v. 7.4) systemd-networkd 219-42.el7_4.16, systemd-resolved 219-42.el7_4.16, systemd-journal-gateway 219-42.el7_4.16
    fixed: vendor fix RHSA-2019:1502
  • Red Hat Enterprise Linux Server Optional EUS (v. 7.5) systemd-networkd 219-57.el7_5.6, systemd-resolved 219-57.el7_5.6, systemd-journal-gateway 219-57.el7_5.6
    fixed: vendor fix RHSA-2019:1322
  • Red Hat Enterprise Linux Server Optional TUS (v. 7.3) systemd-networkd 219-30.el7_3.14, systemd-resolved 219-30.el7_3.14, systemd-journal-gateway 219-30.el7_3.14 Red Hat Enterprise Linux Server TUS (v. 7.3) systemd 219-30.el7_3.14, libgudev1 219-30.el7_3.14, systemd-libs 219-30.el7_3.14, systemd-sysv 219-30.el7_3.14, systemd-python 219-30.el7_3.14
    fixed: vendor fix RHSA-2019:2805
  • Red Hat Enterprise Linux Workstation (v. 7) systemd 219-62.el7_6.5, libgudev1 219-62.el7_6.5, systemd-libs 219-62.el7_6.5, systemd-sysv 219-62.el7_6.5, systemd-python 219-62.el7_6.5 Red Hat Enterprise Linux Workstation Optional (v. 7) systemd-networkd 219-62.el7_6.5, systemd-resolved 219-62.el7_6.5, systemd-journal-gateway 219-62.el7_6.5
    fixed: vendor fix RHSA-2019:0368
  • Red Hat Virtualization 4 Hypervisor for RHEL 7 rhvm-appliance 4.2-20190224.0.el7, redhat-virtualization-host 4.2-20190219.0.el7_6, redhat-virtualization-host-image-update 4.2-20190219.0.el7_6 Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts rhvm-appliance 4.2-20190224.0.el7
    fixed: vendor fix RHSA-2019:0461
  • Red Hat RHEL 7-based RHEV-H for RHEV 4 (build requirements) redhat-release-virtualization-host 4.2-8.3.el7, redhat-virtualization-host-image-update-placeholder 4.2-8.3.el7
    fixed: vendor fix RHSA-2019:0457

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

2.04% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • openwall.com http://www.openwall.com/lists/oss-security/2021/07/20/2 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 4.9 AV:L/AC:L/Au:N/C:N/I:N/A:C

Classification

Weakness

References

Sources

Fencer Intel 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.