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TI-2021-02567 Aliases CVE-2021-3621GHSA-g527-g4q2-57xc

Command injection in sssd

Priority MEDIUM 43CWE-77Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 16 fixed, 1 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-77.

Summary

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.

Why it matters now

EPSS 0.02648 85th percentileScored 2026-11-07
Fix Partial Red Hat: 6 advisoriesRed Hat: 16 fixed, 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—sssdsssd 2.6.0—No fix listedCNA
  • sssd Vendor— Affected sssd 2.6.0 Fixed in — No fix listed CNA

CPE configurations NVD · 13

CPEVersionsRoleVendor
cpe:2.3:a:fedoraproject:sssd:2.6.0:*:*:*:*:*:*:*2.6.0VulnerableFedoraproject
cpe:2.3:a:redhat:virtualization:4.0:*:*:*:*:*:*:*4.0VulnerableRed Hat
cpe:2.3:a:redhat:virtualization_host:4.0:*:*:*:*:*:*:*4.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*8.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_eus:8.1:*:*:*:*:*:*:*8.1VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_eus:8.2:*:*:*:*:*:*:*8.2VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_aus:8.2:*:*:*:*:*:*:*8.2VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_aus:8.4:*:*:*:*:*:*:*8.4VulnerableRed Hat
  • cpe:2.3:a:fedoraproject:sssd:2.6.0:*:*:*:*:*:*:* Versions 2.6.0 Vulnerable ·Fedoraproject
  • cpe:2.3:a:redhat:virtualization:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·Red Hat
  • cpe:2.3:a:redhat:virtualization_host:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_eus:8.1:*:*:*:*:*:*:* Versions 8.1 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_eus:8.2:*:*:*:*:*:*:* Versions 8.2 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_aus:8.2:*:*:*:*:*:*:* Versions 8.2 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_aus:8.4:*:*:*:*:*:*:* Versions 8.4 Vulnerable ·Red Hat
Show 3 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:redhat:enterprise_linux_server_tus:8.2:*:*:*:*:*:*:*8.2VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_tus:8.4:*:*:*:*:*:*:*8.4VulnerableRed Hat
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*34VulnerableFedoraproject
  • cpe:2.3:o:redhat:enterprise_linux_server_tus:8.2:*:*:*:*:*:*:* Versions 8.2 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_tus:8.4:*:*:*:*:*:*:* Versions 8.4 Vulnerable ·Red Hat
  • cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* Versions 34 Vulnerable ·Fedoraproject

Remediation

Red Hat 6 advisories

  • RHSA-2021:3477 Released 2021-09-09 · Red Hat rating Important
    RHV-H security update (redhat-virtualization-host) 4.3.18
    • RHEL 7-based RHEV-H for RHEV 4 (build requirements) redhat-virtualization-host-4.3.18-20210903.0.el7_9, redhat-virtualization-host-image-update-4.3.18-20210903.0.el7_9
    • Red Hat Virtualization 4 Hypervisor for RHEL 7 redhat-virtualization-host-4.3.18-20210903.0.el7_9, redhat-virtualization-host-image-update-4.3.18-20210903.0.el7_9
  • RHSA-2021:3365 Released 2021-08-31 · Red Hat rating Important
    sssd security update
    • Red Hat CodeReady Linux Builder EUS (v. 8.2) libsss_nss_idmap-devel-2.2.3-20.el8_2.1
    • Red Hat Enterprise Linux BaseOS EUS (v. 8.2) libipa_hbac-2.2.3-20.el8_2.1, libsss_autofs-2.2.3-20.el8_2.1, libsss_certmap-2.2.3-20.el8_2.1 +26
  • RHSA-2021:3336 Released 2021-08-31 · Red Hat rating Important
    sssd security and bug fix update
    • Red Hat Enterprise Linux Client (v. 7) libipa_hbac-1.16.5-10.el7_9.10, libsss_autofs-1.16.5-10.el7_9.10, libsss_certmap-1.16.5-10.el7_9.10 +24
    • Red Hat Enterprise Linux Client Optional (v. 7) libipa_hbac-devel-1.16.5-10.el7_9.10, libsss_certmap-devel-1.16.5-10.el7_9.10, libsss_idmap-devel-1.16.5-10.el7_9.10 +4
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) libipa_hbac-devel-1.16.5-10.el7_9.10, libsss_certmap-devel-1.16.5-10.el7_9.10, libsss_idmap-devel-1.16.5-10.el7_9.10 +4
    • Red Hat Enterprise Linux Server (v. 7) libipa_hbac-1.16.5-10.el7_9.10, libipa_hbac-1.16.5-10.el7_9.10.ppc, libsss_autofs-1.16.5-10.el7_9.10 +31
    • Red Hat Enterprise Linux Server Optional (v. 7) libipa_hbac-devel-1.16.5-10.el7_9.10, libipa_hbac-devel-1.16.5-10.el7_9.10.ppc, libsss_certmap-devel-1.16.5-10.el7_9.10 +10
    • Red Hat Enterprise Linux Workstation (v. 7) libipa_hbac-1.16.5-10.el7_9.10, libsss_autofs-1.16.5-10.el7_9.10, libsss_certmap-1.16.5-10.el7_9.10 +25
    • Red Hat Enterprise Linux Workstation Optional (v. 7) libipa_hbac-devel-1.16.5-10.el7_9.10, libsss_certmap-devel-1.16.5-10.el7_9.10, libsss_idmap-devel-1.16.5-10.el7_9.10 +3
Show 3 more Red Hat advisories
  • RHSA-2021:3235 Released 2021-08-19 · Red Hat rating Important
    Red Hat Virtualization Host security and bug fix update [ovirt-4.4.7]
    • Red Hat Virtualization 4 Hypervisor for RHEL 8 redhat-virtualization-host-4.4.7-20210804.0.el8_4, redhat-virtualization-host-image-update-4.4.7-20210804.0.el8_4
  • RHSA-2021:3178 Released 2021-08-17 · Red Hat rating Important
    sssd security update
    • Red Hat CodeReady Linux Builder EUS (v. 8.1) libsss_nss_idmap-devel-2.2.0-19.el8_1.2
    • Red Hat Enterprise Linux BaseOS EUS (v. 8.1) libipa_hbac-2.2.0-19.el8_1.2, libsss_autofs-2.2.0-19.el8_1.2, libsss_certmap-2.2.0-19.el8_1.2 +26
  • RHSA-2021:3151 Released 2021-08-16 · Red Hat rating Important
    sssd security update
    • Red Hat CodeReady Linux Builder (v. 8) libsss_nss_idmap-devel-2.4.0-9.el8_4.2
    • Red Hat Enterprise Linux BaseOS (v. 8) libipa_hbac-2.4.0-9.el8_4.2, libsss_autofs-2.4.0-9.el8_4.2, libsss_certmap-2.4.0-9.el8_4.2 +26

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
RHEL 7-based RHEV-H for RHEV 4 (build requirements)Fixed RHSA-2021:3477
Red Hat CodeReady Linux Builder (v. 8)Fixed RHSA-2021:3151
Red Hat CodeReady Linux Builder EUS (v. 8.1)Fixed RHSA-2021:3178
Red Hat CodeReady Linux Builder EUS (v. 8.2)Fixed RHSA-2021:3365
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2021:3151
Red Hat Enterprise Linux BaseOS EUS (v. 8.1)Fixed RHSA-2021:3178
Red Hat Enterprise Linux BaseOS EUS (v. 8.2)Fixed RHSA-2021:3365
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2021:3336
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2021:3336
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2021:3336
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2021:3336
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2021:3336
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2021:3336
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2021:3336
Red Hat Virtualization 4 Hypervisor for RHEL 7Fixed RHSA-2021:3477
Red Hat Virtualization 4 Hypervisor for RHEL 8Fixed RHSA-2021:3235
Not affected: 3 products
  • RHEL 7-based RHEV-H for RHEV 4 (build requirements)
  • RHEL 8-based RHEV-H for RHEV 4 (build requirements)
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-3621
  2. 2026-10-03 Alias added: GHSA-g527-g4q2-57xc

References

Patch 1

Advisory 2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences