CVE-2020-3315

MEDIUM

Cisco Firepower Threat Defense < 6.6.0 - Unauthenticated File Policy Bypass via Crafted HTTP Packets

Title source: llm
STIX 2.1

Description

Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could allow an unauthenticated, remote attacker to bypass the configured file policies on an affected system. The vulnerability is due to errors in how the Snort detection engine handles specific HTTP responses. An attacker could exploit this vulnerability by sending crafted HTTP packets that would flow through an affected system. A successful exploit could allow the attacker to bypass the configured file policies and deliver a malicious payload to the protected network.

Scores

CVSS v3 5.3
EPSS 0.0110
EPSS Percentile 78.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-693 CWE-668
Status published
Products (7)
cisco/firepower_threat_defense < 6.6.0
cisco/ios 15.2\(7\)e
cisco/ios 16.11.2
cisco/ios 17.3.1
cisco/secure_firewall_management_center 2.9.14.4
cisco/secure_firewall_management_center 2.9.15
cisco/secure_firewall_management_center 2.9.16
Published May 06, 2020
Tracked Since Feb 18, 2026