Vulnerability · Published Aug 23, 2022 · Assigned by redhat
CVE-2021-3997
Medium 5.5
In plain English
A medium-severity security flaw in systemd. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.7% (higher than 78% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)1.7%top 22.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | systemd | 250.2-1 | DEBIAN-CVE-2021-3997 |
| Debian:13 | systemd | 250.2-1 | DEBIAN-CVE-2021-3997 |
| Debian:14 | systemd | 250.2-1 | DEBIAN-CVE-2021-3997 |
Affected products (as reported)
Weakness: CWE-674
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2024639
- https://www.openwall.com/lists/oss-security/2022/01/10/2
- https://github.com/systemd/systemd/commit/5b1cf7a9be37e20133c0208005274ce4a5b5c6a1
- https://access.redhat.com/security/cve/CVE-2021-3997
- GLSA-202305-15 vendor-advisory
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html