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CVE-2023-20244

HIGHCVSS 8.6/10EPSS 0.77%

Last modified

CVE-2023-20244 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. A vulnerability in the internal packet processing of Cisco Firepower Threat Defense (FTD) Software for Cisco Firepower 2100 Series Firewalls could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper handling of certain packets when they are sent to the inspection engine. EPSS estimates a 0.77% chance of exploitation in the next 30 days.

Description

A vulnerability in the internal packet processing of Cisco Firepower Threat Defense (FTD) Software for Cisco Firepower 2100 Series Firewalls could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper handling of certain packets when they are sent to the inspection engine. An attacker could exploit this vulnerability by sending a series of crafted packets to an affected device. A successful exploit could allow the attacker to deplete all 9,472 byte blocks on the device, resulting in traffic loss across the device or an unexpected reload of the device. If the device does not reload on its own, a manual reload of the device would be required to recover from this state.

Metrics

CVSS 3.1
8.6/10

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

EPSS Probability
0.77%

52.4th 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 Defense6.6.0
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 Defense6.7.0
CiscoFirepower Threat Defense6.7.0.1
CiscoFirepower Threat Defense6.7.0.2
CiscoFirepower Threat Defense6.7.0.3

Showing 50 of 70 affected configurations. See NVD for the full list.

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2023-20244?
A vulnerability in the internal packet processing of Cisco Firepower Threat Defense (FTD) Software for Cisco Firepower 2100 Series Firewalls could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper handling of certain packets when they are sent to the inspection engine. An attacker could exploit this vulnerability by sending a series of crafted packets to an affected device. A successful exploit could allow the attacker to deplete all 9,472 byte blocks on the device, resulting in traffic loss across the device or an unexpected reload of the device. If the device does not reload on its own, a manual reload of the device would be required to recover from this state.
How severe is CVE-2023-20244?
CVE-2023-20244 has a CVSS score of 8.6/10 (HIGH severity). The EPSS model estimates a 0.77% probability of exploitation in the next 30 days.
How do I fix CVE-2023-20244?
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.

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Source: NVD / NIST