CVE-2019-6454

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

Published Mar 17, 2019 CVSS 3.1 · 5.5 Medium EPSS 2.0% KEV · Not listed
Description
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).

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-1684-1 systemd security update
Debian DSA Debian DSA DSA-4393-1 systemd security update
EUVD EUVD EUVD-2019-16014 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).
Ubuntu USN Ubuntu USN USN-3891-1 systemd vulnerability
History

No history.

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Aug 4, 2024, 8:23 PM
Reserved
Jan 16, 2019, 12:00 AM
Status
Modified
Published
Mar 21, 2019, 4:01 PM
Modified
Jun 17, 2026, 2:39 AM
Severity
Important
Public date
Feb 18, 2019, 12:00 AM