CVE-2021-3997
MEDIUM severity · CVSS 5.5 · CWE-674
5.5CVSS MEDIUM
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.
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)2%
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected products we track (2)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Official patch: https://bugzilla.redhat.com/show_bug.cgi?id=2024639 ↗
Additional information
- NVD record
- https://bugzilla.redhat.com/show_bug.cgi?id=2024639Patch
- https://github.com/systemd/systemd/commit/5b1cf7a9be37e20133c0208005274ce4a5b5c6a1Patch
- https://access.redhat.com/security/cve/CVE-2021-3997Advisory
- https://security.gentoo.org/glsa/202305-15
- https://www.openwall.com/lists/oss-security/2022/01/10/2Advisory