Vulnerability 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).
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Systemd Project | Systemd | 239 |
| Opensuse | Leap | 15.0 |
| Netapp | Active Iq Performance Analytics Services | - |
| Debian | Debian Linux | 8.0 |
| Fedoraproject | Fedora | 29 |
| Canonical | Ubuntu Linux | 16.04 |
| Redhat | Enterprise Linux | 8.0 |
| Redhat | Enterprise Linux Compute Node Eus | 7.5 |
| Redhat | Enterprise Linux Desktop | 7.0 |
| Redhat | Enterprise Linux Eus | 7.4 |
| Redhat | Enterprise Linux For Ibm Z Systems Eus | 7.4 |
| 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 Server | 7.0 |
| Redhat | Enterprise Linux Server Aus | 7.3 |
| 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 Tus | 7.3 |
| Redhat | Enterprise Linux Server Update Services For Sap Solutions | 7.3 |
Related Weaknesses (CWE)
References
- http://lists.opensuse.org/opensuse-security-announce/2019-02/msg00070.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00062.htmlMailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2019/02/18/3Mailing ListPatchThird Party Advisory
- http://www.openwall.com/lists/oss-security/2019/02/19/1Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2021/07/20/2ExploitMailing ListThird Party Advisory
- http://www.securityfocus.com/bid/107081Third Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2019:0368Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0990Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1322Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1502Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:2805Third Party Advisory
- https://github.com/systemd/systemd/commits/master/src/libsystemd/sd-bus/bus-objePatchThird Party Advisory
- https://kc.mcafee.com/corporate/index?page=content&id=SB10278PatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/02/msg00031.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
FAQ
What is CVE-2019-6454?
CVE-2019-6454 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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...
How severe is CVE-2019-6454?
CVE-2019-6454 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2019-6454?
Check the references section above for vendor advisories and patch information. Affected products include: Systemd Project Systemd, Opensuse Leap, Netapp Active Iq Performance Analytics Services, Debian Debian Linux, Fedoraproject Fedora.