ISOMAN

CVE

CVE-2019-6454

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).

Severity
MEDIUM
CVSS
5.5
Published
Modified
NVD detailAll CVEs

Linked Releases

DistributionReleaseStatusEvidence
Ubuntu18.04.6 amd64 desktopunknownsource
Ubuntu18.04.6 amd64 live-serverunknownsource
Ubuntu16.04.7 amd64 desktopunknownsource
Ubuntu16.04.6 i386 desktopunknownsource
Ubuntu16.04.7 amd64 serverunknownsource
Ubuntu16.04.6 i386 serverunknownsource

References

  1. http://lists.opensuse.org/opensuse-security-announce/2019-02/msg00070.html
  2. http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00062.html
  3. http://www.openwall.com/lists/oss-security/2019/02/18/3
  4. http://www.openwall.com/lists/oss-security/2019/02/19/1
  5. http://www.openwall.com/lists/oss-security/2021/07/20/2
  6. http://www.securityfocus.com/bid/107081
  7. https://access.redhat.com/errata/RHSA-2019:0368
  8. https://access.redhat.com/errata/RHSA-2019:0990
  9. https://access.redhat.com/errata/RHSA-2019:1322
  10. https://access.redhat.com/errata/RHSA-2019:1502
  11. https://access.redhat.com/errata/RHSA-2019:2805
  12. https://github.com/systemd/systemd/commits/master/src/libsystemd/sd-bus/bus-objects.c
  13. https://kc.mcafee.com/corporate/index?page=content&id=SB10278
  14. https://lists.debian.org/debian-lts-announce/2019/02/msg00031.html
  15. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N67IOBOTDOMVNQJ5QRU2MXLEECXPGNVJ/
  16. https://security.netapp.com/advisory/ntap-20190327-0004/
  17. https://usn.ubuntu.com/3891-1/
  18. https://www.debian.org/security/2019/dsa-4393
  19. http://lists.opensuse.org/opensuse-security-announce/2019-02/msg00070.html
  20. http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00062.html