Public Date:
1653861: CVE-2018-16865 systemd: stack overflow when receiving many journald entries
An allocation of memory without limits, that could result in the stack clashing with another memory region, was discovered in systemd-journald when many entries are sent to the journal socket. A local attacker, or a remote one if systemd-journal-remote is used, may use this flaw to crash systemd-journald or execute code with journald privileges.

Find out more about CVE-2018-16865 from the MITRE CVE dictionary dictionary and NIST NVD.


This issue affects the versions of systemd as shipped with Red Hat Enterprise Linux 7. Red Hat Product Security has rated this issue as having a security impact of Important because it allows an attacker to crash systemd-journald or escalate his privileges. For additional information, refer to the Issue Severity Classification:

Red Hat Enterprise Linux 7 ships systemd-journal-remote through the optional systemd-journal-gateway package, which is not installed, nor enabled by default.

CVSS v3 metrics

CVSS3 Base Score 7.5
CVSS3 Base Metrics CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity Impact High
Availability Impact High

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux 7 (systemd) RHSA-2019:0049 2019-01-14
Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts (rhvm-appliance) RHSA-2019:0361 2019-02-18
Red Hat Enterprise Linux Extended Update Support 7.4 (systemd) RHSA-2019:0271 2019-02-04
Red Hat Enterprise Linux Update Services for SAP Solutions 7.3 (systemd) RHSA-2019:2402 2019-08-07
Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts (redhat-virtualization-host) RHSA-2019:0342 2019-02-13
Red Hat Enterprise Linux Extended Update Support 7.5 (systemd) RHSA-2019:0204 2019-01-29
Red Hat Enterprise Linux Advanced Update Support 7.3 (systemd) RHSA-2019:2402 2019-08-07
Red Hat Enterprise Linux 7.3 Telco Extended Update Support (systemd) RHSA-2019:2402 2019-08-07

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 8 systemd Not affected
Unless explicitly stated as not affected, all previous versions of packages in any minor update stream of a product listed here should be assumed vulnerable, although may not have been subject to full analysis.


Red Hat would like to thank Qualys Research Labs for reporting this issue.

External References

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