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CVE-2023-20081

MEDIUMCVSS 5.9/10EPSS 0.68%

Last modified

CVE-2023-20081 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. A vulnerability in the IPv6 DHCP (DHCPv6) client module of Cisco Adaptive Security Appliance (ASA) Software, Cisco Firepower Threat Defense (FTD) Software, Cisco IOS Software, and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient validation of DHCPv6 messages. EPSS estimates a 0.68% chance of exploitation in the next 30 days.

Description

A vulnerability in the IPv6 DHCP (DHCPv6) client module of Cisco Adaptive Security Appliance (ASA) Software, Cisco Firepower Threat Defense (FTD) Software, Cisco IOS Software, and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient validation of DHCPv6 messages. An attacker could exploit this vulnerability by sending crafted DHCPv6 messages to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition. Note: To successfully exploit this vulnerability, the attacker would need to either control the DHCPv6 server or be in a man-in-the-middle position.

Metrics

CVSS 3.1
5.9/10

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

EPSS Probability
0.68%

47.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoAdaptive Security Appliance Software9.8.1
CiscoAdaptive Security Appliance Software9.8.1.5
CiscoAdaptive Security Appliance Software9.8.1.7
CiscoAdaptive Security Appliance Software9.8.2
CiscoAdaptive Security Appliance Software9.8.2.8
CiscoAdaptive Security Appliance Software9.8.2.14
CiscoAdaptive Security Appliance Software9.8.2.15
CiscoAdaptive Security Appliance Software9.8.2.17
CiscoAdaptive Security Appliance Software9.8.2.20
CiscoAdaptive Security Appliance Software9.8.2.24
CiscoAdaptive Security Appliance Software9.8.2.26
CiscoAdaptive Security Appliance Software9.8.2.28
CiscoAdaptive Security Appliance Software9.8.2.33
CiscoAdaptive Security Appliance Software9.8.2.35
CiscoAdaptive Security Appliance Software9.8.2.38
CiscoAdaptive Security Appliance Software9.8.2.45
CiscoAdaptive Security Appliance Software9.8.3
CiscoAdaptive Security Appliance Software9.8.3.8
CiscoAdaptive Security Appliance Software9.8.3.11
CiscoAdaptive Security Appliance Software9.8.3.14
CiscoAdaptive Security Appliance Software9.8.3.16
CiscoAdaptive Security Appliance Software9.8.3.18
CiscoAdaptive Security Appliance Software9.8.3.21
CiscoAdaptive Security Appliance Software9.8.3.26
CiscoAdaptive Security Appliance Software9.8.3.29
CiscoAdaptive Security Appliance Software9.8.4
CiscoAdaptive Security Appliance Software9.8.4.3
CiscoAdaptive Security Appliance Software9.8.4.7
CiscoAdaptive Security Appliance Software9.8.4.8
CiscoAdaptive Security Appliance Software9.8.4.10
CiscoAdaptive Security Appliance Software9.8.4.12
CiscoAdaptive Security Appliance Software9.8.4.15
CiscoAdaptive Security Appliance Software9.8.4.17
CiscoAdaptive Security Appliance Software9.8.4.20
CiscoAdaptive Security Appliance Software9.8.4.22
CiscoAdaptive Security Appliance Software9.8.4.25
CiscoAdaptive Security Appliance Software9.8.4.26
CiscoAdaptive Security Appliance Software9.8.4.29
CiscoAdaptive Security Appliance Software9.8.4.32
CiscoAdaptive Security Appliance Software9.8.4.33
CiscoAdaptive Security Appliance Software9.8.4.34
CiscoAdaptive Security Appliance Software9.8.4.35
CiscoAdaptive Security Appliance Software9.8.4.39
CiscoAdaptive Security Appliance Software9.8.4.40
CiscoAdaptive Security Appliance Software9.8.4.41
CiscoAdaptive Security Appliance Software9.8.4.43
CiscoAdaptive Security Appliance Software9.8.4.44
CiscoAdaptive Security Appliance Software9.8.4.45
CiscoAdaptive Security Appliance Software9.9.1
CiscoAdaptive Security Appliance Software9.9.1.2

Showing 50 of 320 affected configurations. See NVD for the full list.

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2023-20081?
A vulnerability in the IPv6 DHCP (DHCPv6) client module of Cisco Adaptive Security Appliance (ASA) Software, Cisco Firepower Threat Defense (FTD) Software, Cisco IOS Software, and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient validation of DHCPv6 messages. An attacker could exploit this vulnerability by sending crafted DHCPv6 messages to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition. Note: To successfully exploit this vulnerability, the attacker would need to either control the DHCPv6 server or be in a man-in-the-middle position.
How severe is CVE-2023-20081?
CVE-2023-20081 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 0.68% probability of exploitation in the next 30 days.
How do I fix CVE-2023-20081?
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-2023-20081?

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

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Source: NVD / NIST