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CVE-2024-20339

HIGHCVSS 7.5/10EPSS 0.72%

Last modified

CVE-2024-20339 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A vulnerability in the TLS processing feature of Cisco Firepower Threat Defense (FTD) Software for Cisco Firepower 2100 Series could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to an issue that occurs when TLS traffic is processed. An attacker could exploit this vulnerability by sending certain TLS traffic over IPv4 through an affected device. EPSS estimates a 0.72% chance of exploitation in the next 30 days.

Description

A vulnerability in the TLS processing feature of Cisco Firepower Threat Defense (FTD) Software for Cisco Firepower 2100 Series could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to an issue that occurs when TLS traffic is processed. An attacker could exploit this vulnerability by sending certain TLS traffic over IPv4 through an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition and impacting traffic to and through the affected device.

Metrics

CVSS 3.1
7.5/10

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

EPSS Probability
0.72%

49.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoFirepower Threat Defense Software6.2.3
CiscoFirepower Threat Defense Software6.2.3.1
CiscoFirepower Threat Defense Software6.2.3.2
CiscoFirepower Threat Defense Software6.2.3.3
CiscoFirepower Threat Defense Software6.2.3.4
CiscoFirepower Threat Defense Software6.2.3.5
CiscoFirepower Threat Defense Software6.2.3.6
CiscoFirepower Threat Defense Software6.2.3.7
CiscoFirepower Threat Defense Software6.2.3.8
CiscoFirepower Threat Defense Software6.2.3.9
CiscoFirepower Threat Defense Software6.2.3.10
CiscoFirepower Threat Defense Software6.2.3.11
CiscoFirepower Threat Defense Software6.2.3.12
CiscoFirepower Threat Defense Software6.2.3.13
CiscoFirepower Threat Defense Software6.2.3.14
CiscoFirepower Threat Defense Software6.2.3.15
CiscoFirepower Threat Defense Software6.2.3.16
CiscoFirepower Threat Defense Software6.2.3.17
CiscoFirepower Threat Defense Software6.2.3.18
CiscoFirepower Threat Defense Software6.4.0
CiscoFirepower Threat Defense Software6.4.0.1
CiscoFirepower Threat Defense Software6.4.0.2
CiscoFirepower Threat Defense Software6.4.0.3
CiscoFirepower Threat Defense Software6.4.0.4
CiscoFirepower Threat Defense Software6.4.0.5
CiscoFirepower Threat Defense Software6.4.0.6
CiscoFirepower Threat Defense Software6.4.0.7
CiscoFirepower Threat Defense Software6.4.0.8
CiscoFirepower Threat Defense Software6.4.0.9
CiscoFirepower Threat Defense Software6.4.0.10
CiscoFirepower Threat Defense Software6.4.0.11
CiscoFirepower Threat Defense Software6.4.0.12
CiscoFirepower Threat Defense Software6.4.0.13
CiscoFirepower Threat Defense Software6.4.0.14
CiscoFirepower Threat Defense Software6.4.0.15
CiscoFirepower Threat Defense Software6.4.0.16
CiscoFirepower Threat Defense Software6.4.0.17
CiscoFirepower Threat Defense Software6.6.0
CiscoFirepower Threat Defense Software6.6.0.1
CiscoFirepower Threat Defense Software6.6.1
CiscoFirepower Threat Defense Software6.6.3
CiscoFirepower Threat Defense Software6.6.4
CiscoFirepower Threat Defense Software6.6.5
CiscoFirepower Threat Defense Software6.6.5.1
CiscoFirepower Threat Defense Software6.6.5.2
CiscoFirepower Threat Defense Software6.6.7
CiscoFirepower Threat Defense Software6.6.7.1
CiscoFirepower Threat Defense Software6.6.7.2
CiscoFirepower Threat Defense Software6.7.0
CiscoFirepower Threat Defense Software6.7.0.1

Showing 50 of 80 affected configurations. See NVD for the full list.

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is CVE-2024-20339?
A vulnerability in the TLS processing feature of Cisco Firepower Threat Defense (FTD) Software for Cisco Firepower 2100 Series could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to an issue that occurs when TLS traffic is processed. An attacker could exploit this vulnerability by sending certain TLS traffic over IPv4 through an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition and impacting traffic to and through the affected device.
How severe is CVE-2024-20339?
CVE-2024-20339 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.72% probability of exploitation in the next 30 days.
How do I fix CVE-2024-20339?
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-2024-20339?

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

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Source: NVD / NIST