Vulnerability identifier: #VU27595

Vulnerability risk: High

CVSSv3.1: 7.2 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:H/RL:O/RC:C]

CVE-ID: CVE-2020-3259

CWE-ID: CWE-200

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 gain access to potentially sensitive information.

The vulnerability exists due to a buffer tracking issue when the software parses invalid URLs that are requested from the web services interface. A remote attacker can send a specially crafted GET request and gain unauthorized access to sensitive information on the system.

Mitigation
Vendor recommends to update the Cisco FTD Software Release to version 6.2.3.16 (June 2020), 6.3.0.6 (future release), 6.4.0.9 (May 2020) and 6.5.0.5 (future release).

Vulnerable software versions

Cisco Adaptive Security Appliance (ASA): 9.5 - 9.13

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

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External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-info-disclose-9eJtycMB
http://www.truesec.com/hub/blog/akira-ransomware-and-exploitation-of-cisco-anyconnect-vulnerability-cve-2020-3259

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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?

Yes. This vulnerability is being exploited in the wild.