CVE-2021-41617 Privilege escalation in n/a
Attackers can escalate privileges via helper programs in OpenSSH when specific non-default configurations are used.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-41617?
CVE-2021-41617 is a high-severity vulnerability in Fedoraproject Fedora, published on 26 Sep 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2021-41617?
It affects 12 products.
Linux distribution packages (40)
openssh AlmaLinux:8 | All versions | 8.0p1-13.el8 |
openssh-askpass AlmaLinux:8 | All versions | 8.0p1-13.el8 |
openssh-cavs AlmaLinux:8 | All versions | 8.0p1-13.el8 |
openssh-clients AlmaLinux:8 | All versions | 8.0p1-13.el8 |
openssh-keycat AlmaLinux:8 | All versions | 8.0p1-13.el8 |
openssh-ldap AlmaLinux:8 | All versions | 8.0p1-13.el8 |
openssh-server AlmaLinux:8 | All versions | 8.0p1-13.el8 |
pam_ssh_agent_auth AlmaLinux:8 | All versions | 0.10.3-7.13.el8 |
openssh Red Hat:enterprise_linux:7::client | All versions | 0:7.4p1-22.el7_9 |
openssh-askpass Red Hat:enterprise_linux:7::client | All versions | 0:7.4p1-22.el7_9 |
openssh-cavs Red Hat:enterprise_linux:7::client | All versions | 0:7.4p1-22.el7_9 |
openssh-clients Red Hat:enterprise_linux:7::client | All versions | 0:7.4p1-22.el7_9 |
openssh-debuginfo Red Hat:enterprise_linux:7::client | All versions | 0:7.4p1-22.el7_9 |
openssh-keycat Red Hat:enterprise_linux:7::client | All versions | 0:7.4p1-22.el7_9 |
openssh-ldap Red Hat:enterprise_linux:7::client | All versions | 0:7.4p1-22.el7_9 |
openssh-server Red Hat:enterprise_linux:7::client | All versions | 0:7.4p1-22.el7_9 |
openssh-server-sysvinit Red Hat:enterprise_linux:7::client | All versions | 0:7.4p1-22.el7_9 |
pam_ssh_agent_auth Red Hat:enterprise_linux:7::client | All versions | 0:0.10.3-2.22.el7_9 |
openssh-askpass Red Hat:enterprise_linux:7::computenode | All versions | 0:7.4p1-22.el7_9 |
openssh-cavs Red Hat:enterprise_linux:7::computenode | All versions | 0:7.4p1-22.el7_9 |
openssh-debuginfo Red Hat:enterprise_linux:7::computenode | All versions | 0:7.4p1-22.el7_9 |
openssh-ldap Red Hat:enterprise_linux:7::computenode | All versions | 0:7.4p1-22.el7_9 |
openssh-server-sysvinit Red Hat:enterprise_linux:7::computenode | All versions | 0:7.4p1-22.el7_9 |
pam_ssh_agent_auth Red Hat:enterprise_linux:7::computenode | All versions | 0:0.10.3-2.22.el7_9 |
openssh Red Hat:enterprise_linux:7::server | All versions | 0:7.4p1-22.el7_9 |
openssh-askpass Red Hat:enterprise_linux:7::server | All versions | 0:7.4p1-22.el7_9 |
openssh-cavs Red Hat:enterprise_linux:7::server | All versions | 0:7.4p1-22.el7_9 |
openssh-clients Red Hat:enterprise_linux:7::server | All versions | 0:7.4p1-22.el7_9 |
openssh-debuginfo Red Hat:enterprise_linux:7::server | All versions | 0:7.4p1-22.el7_9 |
openssh-keycat Red Hat:enterprise_linux:7::server | All versions | 0:7.4p1-22.el7_9 |
openssh-ldap Red Hat:enterprise_linux:7::server | All versions | 0:7.4p1-22.el7_9 |
openssh-server Red Hat:enterprise_linux:7::server | All versions | 0:7.4p1-22.el7_9 |
openssh-server-sysvinit Red Hat:enterprise_linux:7::server | All versions | 0:7.4p1-22.el7_9 |
pam_ssh_agent_auth Red Hat:enterprise_linux:7::server | All versions | 0:0.10.3-2.22.el7_9 |
openssh Red Hat:enterprise_linux:7::workstation | All versions | 0:7.4p1-22.el7_9 |
openssh-askpass Red Hat:enterprise_linux:7::workstation | All versions | 0:7.4p1-22.el7_9 |
openssh-cavs Red Hat:enterprise_linux:7::workstation | All versions | 0:7.4p1-22.el7_9 |
openssh-clients Red Hat:enterprise_linux:7::workstation | All versions | 0:7.4p1-22.el7_9 |
openssh-debuginfo Red Hat:enterprise_linux:7::workstation | All versions | 0:7.4p1-22.el7_9 |
openssh-keycat Red Hat:enterprise_linux:7::workstation | All versions | 0:7.4p1-22.el7_9 |
Products include Fedoraproject Fedora, Netapp Active Iq Unified Manager, Netapp Aff 500f Firmware, Netapp Aff A250 Firmware, Netapp Clustered Data Ontap, Netapp Hci Management Node and 6 more.
How do I fix CVE-2021-41617?
Upgrade to a fixed version.
Is CVE-2021-41617 being exploited?
There is no known exploitation of CVE-2021-41617 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Fedoraproject Fedora
Sources
Also known as ALPINE-CVE-2021-41617, ALSA-2022:2013, CLSA-2021-1639681866, CLSA-2022-1649695840, CLSA-2022-1649695900, CLSA-2023-1688678532 and 18 more.