What’s Vulnerable › Vulnerabilities

CVE-2021-3621

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-12-23 · updated 2026-06-17
• Weakness: CWE-77

Description

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.

Affected products

• Fedoraproject Fedora: 34
• [UNKNOWN] sssd: 2.6.0
• Red Hat Enterprise Linux: 6.0, 7.0, 8.0
• RedHat Enterprise Linux Eus: 8.1, 8.2
• RedHat Enterprise Linux Server Aus: 8.2, 8.4
• RedHat Enterprise Linux Server Tus: 8.2, 8.4
• RedHat Virtualization: 4.0
• RedHat Virtualization Host: 4.0

References

• https://bugzilla.redhat.com/show_bug.cgi?id=1975142
• https://lists.debian.org/debian-lts-announce/2023/05/msg00028.html
• https://sssd.io/release-notes/sssd-2.6.0.html
• https://bugzilla.redhat.com/show_bug.cgi?id=1975142
• https://lists.debian.org/debian-lts-announce/2023/05/msg00028.html
• https://lists.debian.org/debian-lts-announce/2025/02/msg00008.html
• https://sssd.io/release-notes/sssd-2.6.0.html

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