NexaPulse
Subscribe
5.8mediumMedium

CVE-2020-3299

Cisco Secure Firewall Threat Defense

Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured File Policy for HTTP. The vulnerability is due to incorrect detection of modified HTTP packets used in chunked responses. An attacker could exploit this vulnerability by sending crafted HTTP packets through an affected device. A successful exploit could allow the attacker to bypass a configured File Policy for HTTP packets and deliver a malicious payload.

Exploitation status

  • A vendor advisory or patch reference has been published.

What the metrics mean

  • It is reachable over a network, without needing local access.
  • For an attacker who can reach it, no special conditions are needed to exploit it.
  • To exploit it, no account is needed.
  • Beyond that, no action by a user is required.

Scoring

CVSS
5.8 (v3.1)
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
Weakness
CWE-693
Assigned by
psirt@cisco.com

Dates

Published
2020-10-21
Last modified
2026-08-11
Sources
NVD

Affected products

  • Cisco Secure Firewall Threat Defense6.0.0 - 6.3.0.1
  • Cisco Cloud Services Router 1000vall versions
  • Cisco Isrvall versions
  • Cisco 1100-4pall versions
  • Cisco 1100-8pall versions
  • Cisco 1101-4pall versions
  • Cisco 1109-2pall versions
  • Cisco 1109-4pall versions
  • Cisco 1111x-8pall versions
  • Cisco 4221 Integrated Services Routerall versions
  • Cisco 4331 Integrated Services Routerall versions
  • Cisco 4431 Integrated Services Routerall versions

As listed in the NVD configuration data. Not a statement about your estate.

References