Vulnerability in Systemd Project
CVE-2022-3821
An off-by-one Error issue was discovered in Systemd in format_timespan() function of time-util.c. An attacker could supply specific values for time and accuracy that leads to buffer overrun in format_timespan(), leading to a Denial of Service.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (34.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 34.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Systemd Project
- Fedoraproject Fedora — versions 35
- Red Hat Enterprise Linux — versions 8.0, 9.0
- Systemd — versions Fixed in systemd v252-rc1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
- github.com/systemd/systemd/issues/23928 (Exploit, Third Party Advisory, Issue Tracking)
- github.com/systemd/systemd/pull/23933 (Patch, Third Party Advisory)
- github.com/systemd/systemd/commit/9102c625a673a3246d7e73d8737f3494446bad4e (Patch, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- security.gentoo.org/glsa/202305-15 (vendor-advisory)
- lists.debian.org/debian-lts-announce/2023/06/msg00036.html (mailing-list)
Frequently asked questions
- What is CVE-2022-3821?
- CVE-2022-3821 is a medium-severity vulnerability in Systemd Project, classified under Off-by-one Error. CVSS score: 5.5/10. Published 2022-11-08.
- How severe is CVE-2022-3821?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2022-3821 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.