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Oracle Linux: CVE-2019-6454: ELSA-2019-0990: systemd security and bug fix update (MODERATE) (Multiple Advisories)

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Oracle Linux: CVE-2019-6454: ELSA-2019-0990: systemd security and bug fix update (MODERATE) (Multiple Advisories)

Severity
6
CVSS
(AV:L/AC:H/Au:S/C:C/I:C/A:C)
Published
02/18/2019
Created
07/23/2020
Added
07/21/2020
Modified
07/22/2024

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). It was discovered that systemd allocates a buffer large enough to store the path field of a dbus message without performing enough checks. A local attacker may trigger this flaw by sending a dbus message to systemd with a large path making systemd crash or possibly elevating his privileges.

Solution(s)

  • oracle-linux-upgrade-libgudev1
  • oracle-linux-upgrade-libgudev1-devel
  • oracle-linux-upgrade-systemd
  • oracle-linux-upgrade-systemd-container
  • oracle-linux-upgrade-systemd-devel
  • oracle-linux-upgrade-systemd-journal-gateway
  • oracle-linux-upgrade-systemd-journal-remote
  • oracle-linux-upgrade-systemd-libs
  • oracle-linux-upgrade-systemd-networkd
  • oracle-linux-upgrade-systemd-pam
  • oracle-linux-upgrade-systemd-python
  • oracle-linux-upgrade-systemd-resolved
  • oracle-linux-upgrade-systemd-sysv
  • oracle-linux-upgrade-systemd-tests
  • oracle-linux-upgrade-systemd-udev

References

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