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CVE-2019-6454

Published: 19 February 2019

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).

Priority

Medium

CVSS 3 base score: 5.5

Status

Package Release Status
systemd
Launchpad, Ubuntu, Debian
bionic
Released (237-3ubuntu10.13)
cosmic
Released (239-7ubuntu10.8)
precise Does not exist

trusty Not vulnerable

upstream Needs triage

xenial
Released (229-4ubuntu21.16)