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Vulnerability · Published Sep 26, 2021 · Assigned by mitre

CVE-2021-41617

High 7.0

In plain English

A high-severity security flaw in the openssh package (AlmaLinux). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.5% (higher than 85% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)7.0High
Exploit odds (30 days)2.5%top 14.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling1Public PoC

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8openssh8.0p1-13.el8ALSA-2022:2013
AlmaLinux:8openssh-askpass8.0p1-13.el8ALSA-2022:2013
AlmaLinux:8openssh-cavs8.0p1-13.el8ALSA-2022:2013
AlmaLinux:8openssh-clients8.0p1-13.el8ALSA-2022:2013
AlmaLinux:8openssh-keycat8.0p1-13.el8ALSA-2022:2013
AlmaLinux:8openssh-ldap8.0p1-13.el8ALSA-2022:2013
AlmaLinux:8openssh-server8.0p1-13.el8ALSA-2022:2013
AlmaLinux:8pam_ssh_agent_auth0.10.3-7.13.el8ALSA-2022:2013
Alpine:v3.20openssh8.8_p1-r0ALPINE-CVE-2021-41617
Alpine:v3.21openssh8.8_p1-r0ALPINE-CVE-2021-41617
Alpine:v3.22openssh8.8_p1-r0ALPINE-CVE-2021-41617
Alpine:v3.23openssh8.8_p1-r0ALPINE-CVE-2021-41617
Alpine:v3.24openssh8.8_p1-r0ALPINE-CVE-2021-41617
Debian:12openssh1:8.7p1-1DEBIAN-CVE-2021-41617
Debian:13openssh1:8.7p1-1DEBIAN-CVE-2021-41617
Debian:14openssh1:8.7p1-1DEBIAN-CVE-2021-41617
Rocky Linux:8openssh0:8.0p1-13.el8RLSA-2022:2013
Ubuntu:22.04:LTSopenssh1:8.9p1-3ubuntu0.6USN-6565-1
Ubuntu:22.04:LTSopenssh-ssh1no fix listedUBUNTU-CVE-2021-41617
Ubuntu:24.04:LTSopenssh-ssh1no fix listedUBUNTU-CVE-2021-41617
Ubuntu:25.10openssh-ssh1no fix listedUBUNTU-CVE-2021-41617
Ubuntu:26.04:LTSopenssh-ssh1no fix listedUBUNTU-CVE-2021-41617
Ubuntu:26.10openssh-ssh1no fix listedUBUNTU-CVE-2021-41617

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

References