CVE-2020-1669: Junos OS: NFX350: Password hashes stored in world-readable format
First published: Fri Oct 16 2020(Updated: )
The Juniper Device Manager (JDM) container, used by the disaggregated Junos OS architecture on Juniper Networks NFX350 Series devices, stores password hashes in the world-readable file /etc/passwd. This is not a security best current practice as it can allow an attacker with access to the local filesystem the ability to brute-force decrypt password hashes stored on the system. This issue affects Juniper Networks Junos OS on NFX350: 19.4 versions prior to 19.4R3; 20.1 versions prior to 20.1R1-S4, 20.1R2.
Credit: sirt@juniper.net
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Junos OS Evolved | =19.4-r1 | |
| Junos OS Evolved | =19.4-r1-s1 | |
| Junos OS Evolved | =19.4-r1-s2 | |
| Junos OS Evolved | =19.4-r2 | |
| Junos OS Evolved | =20.1-r1 | |
| Junos OS Evolved | =20.1-r1-s1 | |
| Junos OS Evolved | =20.1-r1-s2 | |
| Junos OS Evolved | =20.1-r1-s3 | |
| Juniper NFX Series |
Remedy
Junos OS now stores local password hashes in the protected /etc/shadow file. The following software releases have been updated to resolve this specific issue: Junos OS 19.4R3, 20.1R1-S4, 20.1R2, 20.2R1, and all subsequent releases.
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2020-1669?
CVE-2020-1669 has been classified with a medium severity due to the exposure of sensitive password hashes.
How do I fix CVE-2020-1669?
To mitigate CVE-2020-1669, ensure that the configuration settings restrict access to the /etc/passwd file to only authorized users.
Which devices are affected by CVE-2020-1669?
CVE-2020-1669 affects Juniper Networks NFX350 Series devices running specific versions of Junos OS.
What type of vulnerability is CVE-2020-1669?
CVE-2020-1669 is a local file permission vulnerability that allows unauthorized access to password hashes.
Is there a recommended update for CVE-2020-1669?
Yes, applying updates and patches provided by Juniper for affected versions of Junos OS is recommended to address CVE-2020-1669.
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