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).

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-787

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

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 List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2019/02/18/3Mailing List, Patch, Third Party Advisory
http://www.openwall.com/lists/oss-security/2019/02/19/1Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/07/20/2Exploit, Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/107081Third Party Advisory, VDB 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-objects.cPatch, Third Party Advisory
https://kc.mcafee.com/corporate/index?page=content&id=SB10278Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/02/msg00031.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N67IOBOTDOMVNQJ5QRU2MXLEECXPGNVJ/
https://security.netapp.com/advisory/ntap-20190327-0004/Third Party Advisory
https://usn.ubuntu.com/3891-1/Third Party Advisory
https://www.debian.org/security/2019/dsa-4393Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-02/msg00070.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00062.htmlMailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2019/02/18/3Mailing List, Patch, Third Party Advisory
http://www.openwall.com/lists/oss-security/2019/02/19/1Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/07/20/2Exploit, Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/107081Third Party Advisory, VDB 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-objects.cPatch, Third Party Advisory
https://kc.mcafee.com/corporate/index?page=content&id=SB10278Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/02/msg00031.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N67IOBOTDOMVNQJ5QRU2MXLEECXPGNVJ/
https://security.netapp.com/advisory/ntap-20190327-0004/Third Party Advisory
https://usn.ubuntu.com/3891-1/Third Party Advisory
https://www.debian.org/security/2019/dsa-4393Third Party Advisory

Timeline

Published: Mar 21, 2019
Last modified: Jun 17, 2026
NVD status: Modified

CVE-2019-6454