medium
5.5
CWE
787
Advisory Published
CVE Published
Updated

CVE-2019-6454

First published: Thu Jan 17 2019(Updated: )

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).

Credit: cve@mitre.org cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
debian/systemd
247.3-7+deb11u5
247.3-7+deb11u6
252.31-1~deb12u1
257~rc3-1
257-1
systemd=239
openSUSE=15.0
NetApp Active IQ
Debian=8.0
Debian=9.0
Fedora=29
Ubuntu=16.04
Ubuntu=18.04
Ubuntu=18.10
Red Hat Enterprise Linux=8.0
Red Hat Enterprise Linux Compute Node EUS=7.5
redhat enterprise Linux desktop=7.0
redhat enterprise Linux eus=7.4
redhat enterprise Linux eus=7.5
redhat enterprise Linux eus=8.1
redhat enterprise Linux eus=8.2
redhat enterprise Linux eus=8.4
redhat enterprise Linux for ibm z systems eus=7.4
redhat enterprise Linux for ibm z systems eus=7.5
redhat enterprise Linux for ibm z systems eus=8.1
redhat enterprise Linux for ibm z systems eus=8.2
redhat enterprise Linux for ibm z systems eus=8.4
redhat enterprise Linux for power big endian eus=7.4
redhat enterprise Linux for power little endian=8.0
redhat enterprise Linux for power little endian eus=7.4
redhat enterprise Linux for power little endian eus=7.5
redhat enterprise Linux for power little endian eus=8.1
redhat enterprise Linux for power little endian eus=8.2
redhat enterprise Linux for power little endian eus=8.4
redhat enterprise Linux server=7.0
redhat enterprise Linux server aus=7.3
redhat enterprise Linux server aus=7.4
redhat enterprise Linux server aus=7.6
redhat enterprise Linux server aus=8.2
redhat enterprise Linux server aus=8.4
redhat enterprise Linux server eus=7.6
redhat enterprise Linux server for power little endian update services for sap solutions=7.3
redhat enterprise Linux server for power little endian update services for sap solutions=7.4
redhat enterprise Linux server for power little endian update services for sap solutions=8.0
redhat enterprise Linux server for power little endian update services for sap solutions=8.1
redhat enterprise Linux server for power little endian update services for sap solutions=8.2
redhat enterprise Linux server tus=7.3
redhat enterprise Linux server tus=7.4
redhat enterprise Linux server tus=7.6
redhat enterprise Linux server tus=8.2
redhat enterprise Linux server tus=8.4
redhat enterprise Linux server update services for sap solutions=7.3
redhat enterprise Linux server update services for sap solutions=7.4
redhat enterprise Linux server update services for sap solutions=8.0
redhat enterprise Linux server update services for sap solutions=8.1
redhat enterprise Linux server update services for sap solutions=8.2
redhat enterprise Linux workstation=7.0
McAfee Web Gateway<7.7.2.21
McAfee Web Gateway>=7.8.0<7.8.2.8
McAfee Web Gateway>=8.0.0<8.1.1

Remedy

http://www.openwall.com/lists/oss-security/2019/02/18/3

Remedy

https://github.com/systemd/systemd/commits/master/src/libsystemd/sd-bus/bus-objects.c

Remedy

https://kc.mcafee.com/corporate/index?page=content&id=SB10278

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2019-6454?

    CVE-2019-6454 has been classified as a high severity vulnerability.

  • How do I fix CVE-2019-6454?

    To fix CVE-2019-6454, upgrade the systemd package to version 247.3-7+deb11u5 or higher.

  • Which systems are affected by CVE-2019-6454?

    CVE-2019-6454 affects systemd version 239 and its various distributions, including Debian, Ubuntu, and Red Hat.

  • What impact does CVE-2019-6454 have?

    An unprivileged local user can exploit CVE-2019-6454 to execute arbitrary code via crafted D-Bus messages.

  • Is CVE-2019-6454 exploitable remotely?

    No, CVE-2019-6454 requires local access to the system to exploit.

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