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Vulnerability record · CVE-2021-41617 · published 26 September 2021

CVE-2021-41617: Openbsd openssh vulnerability

Openbsd · Openssh

sshd in OpenSSH 6.2 through 8.x before 8.8, when certain non-default configurations are used, allows privilege escalation because supplemental groups are not initialized as expected. Helper programs for AuthorizedKeysCommand and AuthorizedPrincipalsCommand may run with privileges associated with group memberships of the sshd process, if the configuration specifies running the command as a different user.

7.0 CVSS 3.1 High EPSS 2.5% · top 15.6%
7.0CVSS 3.1 base score, v2 4.4
2.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
12Affected product versions listed by NVD
30References
14 Jul 2026Last modified by NVD

Description

sshd in OpenSSH 6.2 through 8.x before 8.8, when certain non-default configurations are used, allows privilege escalation because supplemental groups are not initialized as expected. Helper programs for AuthorizedKeysCommand and AuthorizedPrincipalsCommand may run with privileges associated with group memberships of the sshd process, if the configuration specifies running the command as a different user.

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

12 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugzilla.suse.com/show_bug.cgi?id=1190975 Issue TrackingPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2023/12/msg00017.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6XJIONMHMKZDTMH6BQR5TNL
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KVI7RWM2JLNMWTOFK6BDUSG
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W44V2PFQH5YLRN6ZJTVRKAD
https://security.netapp.com/advisory/ntap-20211014-0004/ Third Party Advisory
https://www.debian.org/security/2023/dsa-5586
https://www.openssh.com/security.html Vendor Advisory
https://www.openssh.com/txt/release-8.8 Release NotesVendor Advisory
https://www.openwall.com/lists/oss-security/2021/09/26/1 Mailing ListThird Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.html PatchThird Party Advisory
https://www.oracle.com/security-alerts/cpujul2022.html Third Party Advisory
https://www.starwindsoftware.com/security/sw-20220805-0001/ Third Party Advisory
https://www.tenable.com/plugins/nessus/154174
https://bugzilla.suse.com/show_bug.cgi?id=1190975 Issue TrackingPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2023/12/msg00017.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6XJIONMHMKZDTMH6BQR5TNL
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KVI7RWM2JLNMWTOFK6BDUSG
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W44V2PFQH5YLRN6ZJTVRKAD
https://security.netapp.com/advisory/ntap-20211014-0004/ Third Party Advisory
https://www.debian.org/security/2023/dsa-5586
https://www.openssh.com/security.html Vendor Advisory
https://www.openssh.com/txt/release-8.8 Release NotesVendor Advisory
https://www.openwall.com/lists/oss-security/2021/09/26/1 Mailing ListThird Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.html PatchThird Party Advisory
https://www.oracle.com/security-alerts/cpujul2022.html Third Party Advisory
https://www.starwindsoftware.com/security/sw-20220805-0001/ Third Party Advisory
https://www.tenable.com/plugins/nessus/154174
https://cert-portal.siemens.com/productcert/html/ssa-019113.html
https://cert-portal.siemens.com/productcert/html/ssa-082556.html

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Source: NIST National Vulnerability Database (record CVE-2021-41617), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.