Denial of service in Cisco Adaptive Security Appliance, Firepower Threat Defense, IOS Software and IOS XE Software

1) Input validation error

EUVDB-ID: #VU73980

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-20081

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input in the IPv6 DHCP (DHCPv6) client module. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco Adaptive Security Appliance (ASA): All versions

Cisco Firepower Threat Defense (FTD): All versions

Cisco IOS: All versions

Cisco IOS XE: All versions

CPE2.3

• cpe:2.3:h:cisco_systems:asa:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_ftd:*:*:*:*:*:*:*:*
• cpe:2.3:o:cisco_systems:cisco_ios:*:*:*:*:*:*:*:*
• cpe:2.3:o:cisco_systems:cisco_ios_xe:*:*:*:*:*:*:*:*

External links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftdios-dhcpv6-cli-Zf3zTv

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.