An Incorrect Permission Assignment vulnerability in shell processing of Juniper Networks Junos OS Evolved allows a low-privileged local user to modify the contents of a configuration file which could cause another user to execute arbitrary commands within the context of the follow-on user's session. If the follow-on user is a high-privileged administrator, the attacker could leverage this vulnerability to take complete control of the target system.
While this issue is triggered by a user, other than the attacker, accessing the Junos shell, an attacker simply requires Junos CLI access to exploit this vulnerability.
This issue affects Juniper Networks Junos OS Evolved:
This issue does not affect Juniper Networks Junos OS Evolved versions prior to 19.2R1-EVO.Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
This issue was found during internal product security testing or research.
This issue has been assigned CVE-2022-22248.
The following software releases have been updated to resolve this specific issue: Junos OS Evolved 20.4R3-S1-EVO, 21.2R3-EVO, 21.3R2-EVO, 21.4R1-EVO, and all subsequent releases.This issue is being tracked as 1621536 which is visible on the Customer Support website.Note: Juniper SIRT's policy is not to evaluate releases which are beyond End of Engineering (EOE) or End of Life (EOL).
Software Releases, patches and updates are available at https://support.juniper.net/support/downloads/.
Limit access to the Junos shell by system administrators until an upgrade can be performed.Use access lists or firewall filters to limit access to the Junos CLI only from trusted hosts and administrators.
2022-10-12: Initial Publication.