CVE-2020-1669

Junos OS: NFX350: Password hashes stored in world-readable format

Description

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.

Remediation

Solution:

  • 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.

Workaround:

  • Use access lists or firewall filters to limit access to the device only from trusted hosts. Limit shell access to only trusted system administrators.

Categories

6.3
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.05%
Vendor Advisory juniper.net
Affected: Juniper Networks Junos OS
Published at:
Updated at:

References

Link Tags
https://kb.juniper.net/JSA11066 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2020-1669?
CVE-2020-1669 has been scored as a medium severity vulnerability.
How to fix CVE-2020-1669?
To fix CVE-2020-1669: 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.
Is CVE-2020-1669 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2020-1669 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-1669?
CVE-2020-1669 affects Juniper Networks Junos OS.
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