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).
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
n/a n/a
n/aaffected
References
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N67IOBOTDOMVNQJ5QRU2MXLEECXPGNVJ/ ↗
- http://www.openwall.com/lists/oss-security/2019/02/18/3 ↗
- http://www.securityfocus.com/bid/107081 ↗
- https://usn.ubuntu.com/3891-1/ ↗
- https://access.redhat.com/errata/RHSA-2019:0368 ↗
- https://github.com/systemd/systemd/commits/master/src/libsystemd/sd-bus/bus-objects.c ↗
- http://lists.opensuse.org/opensuse-security-announce/2019-02/msg00070.html ↗
- http://www.openwall.com/lists/oss-security/2019/02/19/1 ↗
- https://lists.debian.org/debian-lts-announce/2019/02/msg00031.html ↗
- https://www.debian.org/security/2019/dsa-4393 ↗
- https://security.netapp.com/advisory/ntap-20190327-0004/ ↗
- https://kc.mcafee.com/corporate/index?page=content&id=SB10278 ↗
- https://access.redhat.com/errata/RHSA-2019:0990 ↗
- http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00062.html ↗
- https://access.redhat.com/errata/RHSA-2019:1322 ↗
- https://access.redhat.com/errata/RHSA-2019:1502 ↗
- https://access.redhat.com/errata/RHSA-2019:2805 ↗
- http://www.openwall.com/lists/oss-security/2021/07/20/2 ↗