Out-of-Bounds Affecting systemd package, versions <237-3ubuntu10.13


0.0
medium

Snyk CVSS

    Attack Complexity Low
    Availability High

    Threat Intelligence

    EPSS 0.04% (9th percentile)
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NVD
5.5 medium
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SUSE
5.5 medium
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Red Hat
7 high

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  • Snyk ID SNYK-UBUNTU1804-SYSTEMD-337636
  • published 19 Feb 2019
  • disclosed 21 Mar 2019

How to fix?

Upgrade Ubuntu:18.04 systemd to version 237-3ubuntu10.13 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream systemd package and not the systemd package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

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).