Improper access control in Cisco AsyncOS Software for Cisco Secure Web Appliance

1) Improper access control

EUVDB-ID: #VU78898

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-2023-20215

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper detection of malicious traffic when the traffic is encoded with a specific content format. A remote attacker can bypass an explicit block rule and receive traffic that should have been rejected by the device.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Cisco AsyncOS for Secure Web Appliance: - - 15.0

CPE2.3

• cpe:2.3:o:cisco_systems:cisco_asyncos_for_secure_web_appliance:*:*:*:*:*:*:*:*
• cpe:2.3:o:cisco_systems:cisco_asyncos_for_secure_web_appliance:14.0:*:*:*:*:*:*:*
• cpe:2.3:o:cisco_systems:cisco_asyncos_for_secure_web_appliance:15.0:*:*:*:*:*:*:*

External links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wsa-bypass-vXvqwzsj

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.