A path traversal vulnerability in the Juniper Networks SRX and vSRX Series may allow an authenticated J-web user to read sensitive system files.

This issue affects Juniper Networks Junos OS on SRX and vSRX Series:

• 19.3 versions prior to 19.3R2-S6, 19.3R3-S1;
• 19.4 versions prior to 19.4R2-S4, 19.4R3;
• 20.1 versions prior to 20.1R1-S4, 20.1R2;
• 20.2 versions prior to 20.2R1-S3, 20.2R2;

This issue does not affect Juniper Networks Junos OS versions prior to 19.3R1.

The examples of the config stanza affected by this issue:

or

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-2021-0231 .

The following software releases have been updated to resolve this specific issue: 19.3R2-S6, 19.3R3-S1, 19.4R2-S4, 19.4R3, 20.1R1-S4, 20.1R2, 20.2R1-S3, 20.2R2, 20.3R1, and all subsequent releases.

This issue is being tracked as 1504528 .

Software releases or updates are available for download at https://support.juniper.net/support/downloads/

There are no viable workarounds for this issue.

To reduce the risk of exploitation of this issue, use access lists or firewall filters to limit access to only trusted administrative networks, hosts and users.

2021-04-14: Initial Publication.

• KB16613: Overview of the Juniper Networks SIRT Quarterly Security Bulletin Publication Process [juniper.net]
• KB16765: In which releases are vulnerabilities fixed? [juniper.net]
• KB16446: Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories [juniper.net]
• Report a Security Vulnerability - How to Contact the Juniper Networks Security Incident Response Team
• CVE-2021-0231 at cve.mitre.org