Vulnerability identifier: #VU99340

Vulnerability risk: Medium

CVSSv3.1: 5.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-20384

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 within the Network Service Group (NSG) feature. A remote attacker can bypass configured ACL rules.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco Adaptive Security Appliance (ASA): 7.0.0 - 7.0.6.2, 7.2.0 - 7.2.8.1, 7.4.0 - 7.4.2, 7.3.0 - 7.3.1.2, 9.20.1 - 9.20.2.22, 9.16.1 - 9.16.4.61, 9.17.1 - 9.17.1.39, 9.18.1 - 9.18.4.29, 9.19.1 - 9.19.1.31, 7.1.0 - 7.1.0.3

Cisco Firepower Threat Defense (FTD): 9.16.4 - 9.16.4.61, 9.17.1 - 9.17.1.39, 9.18.4 - 9.18.4.29, 9.19.1 - 9.19.1.31, 9.20.2 - 9.20.2.22, 7.2.8 - 7.2.8.1, 7.4.2, 7.0.0 - 7.0.6.2, 7.2.5 - 7.2.5.2, 7.4.1 - 7.4.1.1, 7.3.1 - 7.3.1.2, 7.2.6, 7.2.7, 7.4.0, 9.18.3 - 9.18.3.56, 9.20.1 - 9.20.1.5, 7.1.0 - 7.1.0.3, 7.2.4 - 7.2.4.1, 7.3.0, 9.18.2 - 9.18.2.8, 7.2.3, 7.2.2, 9.16.3 - 9.16.3.23, 9.18.1 - 9.18.1.3, 9.16.2 - 9.16.2.14, 9.16.1 - 9.16.1.28, 7.2.1, 7.2.0 - 7.2.0.1

---

External links
http://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-nsgacl-bypass-77XnEAsL

---

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.