CVE-2021-3621
A flaw was found in SSSD, where the sssctl command was vulnerable to shell command injection via the logs-fetch and cache-expire subcommands. This flaw allows an attacker to trick the root user into running a specially crafted sssctl command, such as via sudo, to gain root access. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
Key facts
- CVSS score
- 8.8 (v3.1)
- Severity
- HIGH
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H- Weakness (CWE)
- CWE-77
- EPSS score
- 2.5% (85th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2021-26924)
- Published
- December 23, 2021
- NVD last modified
- June 17, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2021-26924 in the EU Vulnerability Database. Last updated in EUVD on November 3, 2025.
View on the EU Vulnerability DatabaseAffected products
- fedoraproject / fedora
- fedoraproject / sssd
- redhat / enterprise linux
- redhat / enterprise linux
- redhat / enterprise linux
- redhat / enterprise linux eus
- redhat / enterprise linux eus
- redhat / enterprise linux server aus
- redhat / enterprise linux server aus
- redhat / enterprise linux server tus
- redhat / enterprise linux server tus
- redhat / virtualization
- redhat / virtualization host
Certified products that may be affected
25 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.
- Red Hat Enterprise Linux 8 NSS Cryptographic Module - Red Hat, Inc. - FIPS 140 5513 - active
- Red Hat Enterprise Linux 8 Kernel Cryptographic API - Red Hat, LLC - FIPS 140 5461 - active
- Red Hat Enterprise Linux 8 Kernel Cryptographic API - Red Hat, Inc. - FIPS 140 5089 - active
- Red Hat Enterprise Linux 8 OpenSSL Cryptographic Module - Red Hat®, Inc. - FIPS 140 4642 - historical
- Red Hat Enterprise Linux 8 NSS Cryptographic Module - Red Hat®, Inc. - FIPS 140 4458 - historical
See all 25 in the Security Certifications Explorer.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1975142(Issue Tracking, Patch, Third Party Advisory)
- https://lists.debian.org/debian-lts-announce/2023/05/msg00028.html(Third Party Advisory)
- https://lists.debian.org/debian-lts-announce/2025/02/msg00008.html
- https://sssd.io/release-notes/sssd-2.6.0.html(Release Notes, Third Party Advisory)
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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