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{"acknowledgement": "Red Hat would like to thank Qualys Research Labs for reporting this issue.", "bugzilla": {"description": "systemd: Uncontrolled recursion in systemd-tmpfiles when removing files", "id": "2024639", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2024639"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-674", "details": ["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.", "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."], "mitigation": {"lang": "en:us", "value": "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."}, "name": "CVE-2021-3997", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "systemd", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "impact": "low", "package_name": "systemd", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "systemd", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2022-01-10T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-3997\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-3997\nhttps://www.openwall.com/lists/oss-security/2022/01/10/2"], "statement": "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 https://access.redhat.com/solutions/4482841.\nIn OpenShift Container Platform (OCP) systemd package was shipped with OCP 4.7 as a one-off instance and all the later OCP releases (4.8, 4.9) are using systemd from RHEL 8. Hence, the systemd package shipped with OCP 4.7 will not be fixed and the fix will be consumed from RHEL 8.", "threat_severity": "Moderate"}