#VU99324 Authentication Bypass by Spoofing in Cisco Adaptive Security Appliance (ASA) and Cisco Firepower Threat Defense (FTD) - CVE-2024-20299

Vulnerability identifier: #VU99324

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-20299

CWE-ID: CWE-290

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco Adaptive Security Appliance (ASA)
Hardware solutions / Security hardware applicances
Cisco Firepower Threat Defense (FTD)
Hardware solutions / Security hardware applicances

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to a logic error in populating group ACLs when an AnyConnect client establishes a new session toward an affected device. A remote attacker can bypass configured ACL rules.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco Adaptive Security Appliance (ASA): 6.2.3 - 6.2.3.18, 6.4.0 - 6.4.0.16, 6.6.0 - 6.6.7.2, 6.7.0 - 6.7.0.3, 7.0.0 - 7.0.5, 7.1.0 - 7.1.0.3, 7.2.0 - 7.2.3, 7.3.0 - 7.3.1.2, 9.8.1 - 9.8.4.48, 9.12.1 - 9.19.1

Cisco Firepower Threat Defense (FTD): 6.2.3 - 6.2.3.18, 6.4.0 - 6.4.0.16, 6.6.0 - 6.6.7.2, 6.7.0 - 6.7.0.3, 7.0.0 - 7.0.5, 7.1.0 - 7.1.0.3, 7.2.0 - 7.2.3, 7.3.0 - 7.3.1.2, 9.8.1 - 9.8.1.7, 9.8.2 - 9.8.2.45, 9.8.3 - 9.8.3.29, 9.8.4 - 9.8.4.48, 9.12.1 - 9.12.1.3, 9.12.2 - 9.12.2.9, 9.12.3 - 9.12.3.12, 9.12.4 - 9.12.4.55, 9.14.1 - 9.14.1.30, 9.14.2 - 9.14.2.15, 9.14.3 - 9.14.3.18, 9.14.4 - 9.14.4.17, 9.15.1 - 9.15.1.21, 9.16.1 - 9.16.1.28, 9.16.2 - 9.16.2.14, 9.16.3 - 9.16.3.23, 9.16.4 - 9.16.4.9, 9.17.1 - 9.17.1.20, 9.18.1 - 9.18.1.3, 9.18.2 - 9.18.2.8, 9.19.1

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External links
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-acl-bypass-VvnLNKqf
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-xss-M446vbEO
https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-75300

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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.