Asterisk Manager Interface CVE-2019-18610 Arbitrary Command Execution Vulnerability

Description

Asterisk Manager Interface is prone to an arbitrary command-execution vulnerability. An attacker can exploit this issue to execute arbitrary system command on the affected system. This may aid in further attacks. The following Asterisk products are affected: Asterisk Open Source versions 13.x, 16.x and 17.x are vulnerable. Certified Asterisk version 13.21 is vulnerable.

Technologies Affected

• Asterisk Certified Asterisk 13.21
• Asterisk Open Source 13.0
• Asterisk Open Source 13.1.0
• Asterisk Open Source 13.10.0
• Asterisk Open Source 13.11.0
• Asterisk Open Source 13.12.0
• Asterisk Open Source 13.13-cert7
• Asterisk Open Source 13.13.0
• Asterisk Open Source 13.13.1
• Asterisk Open Source 13.14.0
• Asterisk Open Source 13.14.1
• Asterisk Open Source 13.15.0
• Asterisk Open Source 13.16.0
• Asterisk Open Source 13.17.0
• Asterisk Open Source 13.17.1
• Asterisk Open Source 13.18.0
• Asterisk Open Source 13.18.1
• Asterisk Open Source 13.18.2
• Asterisk Open Source 13.18.3
• Asterisk Open Source 13.18.4
• Asterisk Open Source 13.18.5
• Asterisk Open Source 13.19.0
• Asterisk Open Source 13.19.2
• Asterisk Open Source 13.2.0
• Asterisk Open Source 13.20.0
• Asterisk Open Source 13.21.0
• Asterisk Open Source 13.21.1
• Asterisk Open Source 13.22.0
• Asterisk Open Source 13.23.0
• Asterisk Open Source 13.23.1
• Asterisk Open Source 13.24.0
• Asterisk Open Source 13.25.0
• Asterisk Open Source 13.26.0
• Asterisk Open Source 13.27.0
• Asterisk Open Source 13.27.1
• Asterisk Open Source 13.28.0
• Asterisk Open Source 13.28.1
• Asterisk Open Source 13.3.0
• Asterisk Open Source 13.4.0
• Asterisk Open Source 13.5.0
• Asterisk Open Source 13.6.0
• Asterisk Open Source 13.7.0
• Asterisk Open Source 13.8.0
• Asterisk Open Source 13.9.0
• Asterisk Open Source 16.0
• Asterisk Open Source 16.0.0
• Asterisk Open Source 16.0.1
• Asterisk Open Source 16.1.0
• Asterisk Open Source 16.2.0
• Asterisk Open Source 16.2.1
• Asterisk Open Source 16.3.0
• Asterisk Open Source 16.4.0
• Asterisk Open Source 16.4.1
• Asterisk Open Source 16.5.0
• Asterisk Open Source 16.5.1
• Asterisk Open Source 16.6.0
• Asterisk Open Source 16.6.1
• Asterisk Open Source 17.0.0

Recommendations

Block external access at the network boundary, unless external parties require service.
If global access isn’t needed, filter access to the affected computer at the network boundary. Restricting access to only trusted computers and networks might greatly reduce the likelihood of successful exploits.

Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy NIDS to monitor network traffic for signs of anomalous or suspicious activity. This includes but is not limited to requests that include NOP sleds and unexplained incoming and outgoing traffic. This may indicate exploit attempts or activity that results from successful exploits.

Updates are available. Please see the references or vendor advisory for more information.