Information disclosure in Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software

1) Information disclosure

EUVDB-ID: #VU27595

Risk: High

CVSSv4.0: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:A/U:Amber]

CVE-ID: CVE-2020-3259

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

Exploit availability: No

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): - - 9.13

Cisco Firepower Threat Defense (FTD): - - 6.5.0

CPE2.3

• cpe:2.3:h:cisco_systems:asa:9.5:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:asa:9.6:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:asa:9.7:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:asa:9.8:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:asa:9.9:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:asa:9.13:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_ftd:6.2.3:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_ftd:6.3.0:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_ftd:6.4.0:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_ftd:6.5.0:*:*:*:*:*:*:*

External links

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

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.