CVE-2021-41617

Aliases:DEBIAN-CVE-2021-41617ALPINE-CVE-2021-41617UBUNTU-CVE-2021-41617
Advisory lineage Upstream: 0 Downstream: 19
Modified
Published: 26 Sept 2021, 00:00
Last modified:08 Sept 2026, 08:30

Vulnerability Summary

Overall Risk (default)
medium
29/100
CVSS Score
7 HIGH
v3.1 (nvd)
EPSS Score
2.54% LOW
3% probability +2.26%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

26 Sept 2021, 00:00
Published
Vulnerability first disclosed
08 Sept 2026, 08:30
Last Modified
Vulnerability information updated

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 Metrics

  • v3.1•HIGH•Score: 7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  • v2.0•MEDIUM•Score: 4.4AV:L/AC:M/Au:N/C:P/I:P/A:P

EPSS Trends

Current EPSS score: 2.54%• Percentile: 84%

Affected Systems

  • alpine•openssh

    ≥ 6.2, < 8.1_p1-r1 | ≥ 6.2, < 8.3_p1-r3 | ≥ 6.2, < 8.4_p1-r4 | ≥ 6.2, < 8.6_p1-r3 | ≥ 6.2, < 8.8_p1-r0 | ≥ 6.2, < 8.8_p1-r0 | ≥ 6.2, < 8.8_p1-r0 | ≥ 6.2, < 8.8_p1-r0 | ≥ 6.2, < 8.8_p1-r0 | ≥ 6.2, < 8.8_p1-r0 | ≥ 6.2, < 8.8_p1-r0 | ≥ 6.2, < 8.8_p1-r0 | ≥ 6.2, < 8.8_p1-r0 | ≥ 6.2, < 8.8_p1-r0

  • debian•openssh

    < 1:8.4p1-5+deb11u3 | < 1:8.7p1-1 | < 1:8.7p1-1 | < 1:8.7p1-1

  • ubuntu•openssh

    all | < 1:7.2p2-4ubuntu2.10+esm2 | < 1:7.2p2-4ubuntu2.fips.2.10.3 | < 1:8.2p1-4ubuntu0.11 | < 1:8.2p1-4ubuntu0.fips.0.11

  • ubuntu•openssh-ssh1

    all | all | all | all | all | all

  • fedoraproject•fedora

    33 | 34 | 35

  • netapp•active_iq_unified_manager

    na

  • netapp•aff_500f_firmware

    na

  • netapp•aff_a250_firmware

    na

  • netapp•clustered_data_ontap

    na

  • netapp•hci_management_node

    na

  • netapp•ontap_select_deploy_administration_utility

    na

  • netapp•solidfire

    na

  • openbsd•openssh

    ≥ 6.2, < 8.8

  • oracle•http_server

    12.2.1.2.0 | 12.2.1.3.0 | 12.2.1.4.0

  • oracle•zfs_storage_appliance_kit

    8.8

  • starwindsoftware•starwind_virtual_san

    v8r13:14398

References (22)