Strix
26.1K

CVE-2024-20407

MEDIUMCVSS 5.8/10EPSS 0.39%

Last modified

CVE-2024-20407 is a medium-severity vulnerability rated 5.8/10 on the CVSS scale. 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. EPSS estimates a 0.39% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
5.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

EPSS Probability
0.39%

30.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoFirepower Threat Defense6.2.3
CiscoFirepower Threat Defense6.2.3.1
CiscoFirepower Threat Defense6.2.3.2
CiscoFirepower Threat Defense6.2.3.3
CiscoFirepower Threat Defense6.2.3.4
CiscoFirepower Threat Defense6.2.3.5
CiscoFirepower Threat Defense6.2.3.6
CiscoFirepower Threat Defense6.2.3.7
CiscoFirepower Threat Defense6.2.3.8
CiscoFirepower Threat Defense6.2.3.9
CiscoFirepower Threat Defense6.2.3.10
CiscoFirepower Threat Defense6.2.3.11
CiscoFirepower Threat Defense6.2.3.12
CiscoFirepower Threat Defense6.2.3.13
CiscoFirepower Threat Defense6.2.3.14
CiscoFirepower Threat Defense6.2.3.15
CiscoFirepower Threat Defense6.2.3.16
CiscoFirepower Threat Defense6.2.3.17
CiscoFirepower Threat Defense6.2.3.18
CiscoFirepower Threat Defense6.4.0
CiscoFirepower Threat Defense6.4.0.1
CiscoFirepower Threat Defense6.4.0.2
CiscoFirepower Threat Defense6.4.0.3
CiscoFirepower Threat Defense6.4.0.4
CiscoFirepower Threat Defense6.4.0.5
CiscoFirepower Threat Defense6.4.0.6
CiscoFirepower Threat Defense6.4.0.7
CiscoFirepower Threat Defense6.4.0.8
CiscoFirepower Threat Defense6.4.0.9
CiscoFirepower Threat Defense6.4.0.10
CiscoFirepower Threat Defense6.4.0.11
CiscoFirepower Threat Defense6.4.0.12
CiscoFirepower Threat Defense6.4.0.13
CiscoFirepower Threat Defense6.4.0.14
CiscoFirepower Threat Defense6.4.0.15
CiscoFirepower Threat Defense6.4.0.16
CiscoFirepower Threat Defense6.4.0.17
CiscoFirepower Threat Defense6.4.0.18
CiscoFirepower Threat Defense6.6.0
CiscoFirepower Threat Defense6.6.0.1
CiscoFirepower Threat Defense6.6.1
CiscoFirepower Threat Defense6.6.3
CiscoFirepower Threat Defense6.6.4
CiscoFirepower Threat Defense6.6.5
CiscoFirepower Threat Defense6.6.5.1
CiscoFirepower Threat Defense6.6.5.2
CiscoFirepower Threat Defense6.6.7
CiscoFirepower Threat Defense6.6.7.1
CiscoFirepower Threat Defense6.6.7.2
CiscoFirepower Threat Defense6.7.0

Showing 50 of 90 affected configurations. See NVD for the full list.

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is CVE-2024-20407?
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.
How severe is CVE-2024-20407?
CVE-2024-20407 has a CVSS score of 5.8/10 (MEDIUM severity). The EPSS model estimates a 0.39% probability of exploitation in the next 30 days.
How do I fix CVE-2024-20407?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2024-20407?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST