Vulnerability identifier: #VU325
Vulnerability risk: Medium
CVSSv3.1: 8.4 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-119
Exploitation vector: Local
Exploit availability: Yes
Vulnerable software:
Cisco ASA 5500
Hardware solutions /
Security hardware applicances
Cisco ASA 5500-X Series
Hardware solutions /
Security hardware applicances
Cisco PIX Firewall
Hardware solutions /
Security hardware applicances
Vendor: Cisco Systems, Inc
Description
The vulnerability allows a local user to cause denial of service or execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in the command-line interface (CLI) parser. A local authenticated user can trigger buffer overflow and reload the affected device or execute arbitrary code on the target system.
Successful exploitation of this vulnerability will allow a local user to execute arbitrary code on vulnerable system.
The following models of CISCO ASA appliances are affected:
Note: this is a zero-day vulnerability, discovered after security breach of The Equation Group. The exploit code for this vulnerability was publicly exposed and is referred as EPICBANANA Exploit.
Mitigation
Update to Cisco ASA Software Releases 8.4.1 and later.
Vulnerable software versions
Cisco ASA 5500: 7.2.5 - 8.4.x
Cisco ASA 5500-X Series: 8.6.x
Cisco PIX Firewall: All versions
External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160817-asa-cli
http://blogs.cisco.com/security/shadow-brokers
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
Yes. This vulnerability is being exploited in the wild.