CVE-2019-9924

rbash in Bash before 4.4-beta2 did not prevent the shell user from modifying BASH_CMDS, thus allowing the user to execute any command with the permissions of the shell.

Impact of the flaw set to Moderate as restricted shell shall not be used as a security feature alone, as it is very hard to configure it properly and several bypasses exist for it.

This issue did not affect the versions of bash as shipped with Red Hat Enterprise Linux 5 as they did not include support for BASH_CMDS environment variable.

Red Hat Virtualization Hypervisor and Management Appliance were affected by this issue, but do not use the restricted bash shell in a way that would be exposed to attackers. Future updates may address this issue.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.