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Red Hat OpenShift: CVE-2019-6454: systemd: Insufficient input validation in bus_process_object() resulting in PID 1 crash

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Red Hat OpenShift: CVE-2019-6454: systemd: Insufficient input validation in bus_process_object() resulting in PID 1 crash

Severity
5
CVSS
(AV:L/AC:L/Au:N/C:N/I:N/A:C)
Published
03/21/2019
Created
12/30/2020
Added
12/29/2020
Modified
12/29/2020

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).

Solution(s)

  • linuxrpm-upgrade-redhat-coreos

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