#VU47883 Improper Authorization in Cisco Adaptive Security Appliance (ASA) and Cisco Firepower Threat Defense (FTD) - CVE-2020-3578

Vulnerability identifier: #VU47883

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-2020-3578

CWE-ID: CWE-285

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 bypass authorization checks.

The vulnerability exists due to insufficient validation of URLs when portal access rules are configured. A remote attacker can access certain URLs on the affected device, bypass a configured access rule and access parts of the WebVPN portal that are supposed to be blocked.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco Adaptive Security Appliance (ASA): 9.6, 9.7, 9.8, 9.9, 9.10 - 9.14

Cisco Firepower Threat Defense (FTD): 6.2.2, 6.2.3, 6.3.0, 6.4.0, 6.5.0, 6.6.0

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External links
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-rule-bypass-P73ABNWQ

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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.