Medium [CVE-2021-3997] flaw was found in systemd
This medium-severity Red Hat Linux advisory covers CVE-2021-3997 affecting Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat package: systemd.
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Summary
A flaw was found in systemd. An uncontrolled recursion in systemd-tmpfiles may lead to a denial of service at boot time when too many nested directories are created in /tmp.
Red Hat Enterprise Linux 8 has a default 1024 nofile limit, thus preventing `systemd-tmpfiles` from exhausting its stack and crashing. For this reason, this flaw has been rated as having a security impact of Low on Red Hat Enterprise Linux 8.
For more information on default ulimit values, please see. Hence, the systemd package shipped with OCP 4.7 will not be fixed and the fix will be consumed from RHEL 8.
Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-674.
Affected Red Hat products: Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8. Will not fix / out of support: Red Hat Enterprise Linux 7.
Red Hat does not currently list a fixing RHSA for this CVE.
Affected products named by the advisory: Red Hat package: systemd.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 17 hours ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 17 hours ago·verify at source
Mitigation checklist
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Official advisory · high-confidence parse· fetched 17 hours ago·verify at source
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