Vulnerability identifier: #VU57796
Vulnerability risk: Medium
CVSSv3.1: 4.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-358
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 compromise the target system.
The vulnerability exists due to insufficient traffic validation within the Session Initiation Protocol (SIP) Application Level Gateway (ALG) for the Network Address Translation (NAT) feature. A remote attacker can send a specially crafted SIP traffic, open unauthorized connections to the remote host and undertake actions leveraging that host.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Cisco Adaptive Security Appliance (ASA): 9.8 - 9.15
Cisco Firepower Threat Defense (FTD): 6.2.2, 6.2.3, 6.3.0, 6.4.0, 6.5.0, 6.6.0, 6.7.0
External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-natalg-bypass-cpKGqkng
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.