Cisco FTD TCP Intercept/Snort3 Logic Error Allows Policy Bypass
CVE-2024-20407 Published on October 23, 2024
A vulnerability in the interaction between the TCP Intercept feature and the Snort 3 detection engine on Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass configured policies on an affected system. Devices that are configured with Snort 2 are not affected by this vulnerability. This vulnerability is due to a logic error when handling embryonic (half-open) TCP connections. An attacker could exploit this vulnerability by sending a crafted traffic pattern through an affected device. A successful exploit could allow unintended traffic to enter the network protected by the affected device.
Vulnerability Analysis
CVE-2024-20407 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality, with no impact on integrity, and no impact on availability.
Weakness Type
Resource Management Errors
Weaknesses in this category are related to improper management of system resources.
Products Associated with CVE-2024-20407
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Affected Versions
Cisco Firepower Threat Defense Software:- Version 6.2.3 is affected.
- Version 6.2.3.1 is affected.
- Version 6.2.3.2 is affected.
- Version 6.2.3.3 is affected.
- Version 6.2.3.4 is affected.
- Version 6.2.3.5 is affected.
- Version 6.2.3.6 is affected.
- Version 6.2.3.7 is affected.
- Version 6.2.3.8 is affected.
- Version 6.2.3.10 is affected.
- Version 6.2.3.11 is affected.
- Version 6.2.3.9 is affected.
- Version 6.2.3.12 is affected.
- Version 6.2.3.13 is affected.
- Version 6.2.3.14 is affected.
- Version 6.2.3.15 is affected.
- Version 6.2.3.16 is affected.
- Version 6.2.3.17 is affected.
- Version 6.2.3.18 is affected.
- Version 6.6.0 is affected.
- Version 6.6.0.1 is affected.
- Version 6.6.1 is affected.
- Version 6.6.3 is affected.
- Version 6.6.4 is affected.
- Version 6.6.5 is affected.
- Version 6.6.5.1 is affected.
- Version 6.6.5.2 is affected.
- Version 6.6.7 is affected.
- Version 6.6.7.1 is affected.
- Version 6.6.7.2 is affected.
- Version 6.4.0 is affected.
- Version 6.4.0.1 is affected.
- Version 6.4.0.3 is affected.
- Version 6.4.0.2 is affected.
- Version 6.4.0.4 is affected.
- Version 6.4.0.5 is affected.
- Version 6.4.0.6 is affected.
- Version 6.4.0.7 is affected.
- Version 6.4.0.8 is affected.
- Version 6.4.0.9 is affected.
- Version 6.4.0.10 is affected.
- Version 6.4.0.11 is affected.
- Version 6.4.0.12 is affected.
- Version 6.4.0.13 is affected.
- Version 6.4.0.14 is affected.
- Version 6.4.0.15 is affected.
- Version 6.4.0.16 is affected.
- Version 6.4.0.17 is affected.
- Version 6.4.0.18 is affected.
- Version 6.7.0 is affected.
- Version 6.7.0.1 is affected.
- Version 6.7.0.2 is affected.
- Version 6.7.0.3 is affected.
- Version 7.0.0 is affected.
- Version 7.0.0.1 is affected.
- Version 7.0.1 is affected.
- Version 7.0.1.1 is affected.
- Version 7.0.2 is affected.
- Version 7.0.2.1 is affected.
- Version 7.0.3 is affected.
- Version 7.0.4 is affected.
- Version 7.0.5 is affected.
- Version 7.0.6 is affected.
- Version 7.0.6.1 is affected.
- Version 7.0.6.2 is affected.
- Version 7.1.0 is affected.
- Version 7.1.0.1 is affected.
- Version 7.1.0.2 is affected.
- Version 7.1.0.3 is affected.
- Version 7.2.0 is affected.
- Version 7.2.0.1 is affected.
- Version 7.2.1 is affected.
- Version 7.2.2 is affected.
- Version 7.2.3 is affected.
- Version 7.2.4 is affected.
- Version 7.2.4.1 is affected.
- Version 7.2.5 is affected.
- Version 7.2.5.1 is affected.
- Version 7.2.6 is affected.
- Version 7.2.7 is affected.
- Version 7.2.5.2 is affected.
- Version 7.2.8 is affected.
- Version 7.2.8.1 is affected.
- Version 7.3.0 is affected.
- Version 7.3.1 is affected.
- Version 7.3.1.1 is affected.
- Version 7.3.1.2 is affected.
- Version 7.4.0 is affected.
- Version 7.4.1 is affected.
- Version 7.4.1.1 is affected.
- Version 6.2.3, <= 6.2.3.18 is affected.
- Version 6.4.0, <= 6.4.0.18 is affected.
- Version 6.6.0, <= 6.6.7.2 is affected.
- Version 6.7.0, <= 6.7.0.3 is affected.
- Version 7.0.0, <= 7.0.6.2 is affected.
- Version 7.1.0, <= 7.1.0.3 is affected.
- Version 7.2.0, <= 7.2.8.1 is affected.
- Version 7.3.0, <= 7.3.1.2 is affected.
- Version 7.4.0, <= 7.4.1.1 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.