Security News > 2022 > June > Mitel VoIP Bug Exploited in Ransomware Attacks

Ransomware groups are abusing unpatched versions of a Linux-based Mitel VoIP application and using it as a springboard plant malware on targeted systems.

The Mitel focuses on VoIP technology allowing users to make phone calls using an internet connection instead of regular telephone lines.

According to Crowdstrike, the vulnerability affects the Mitel MiVoice appliances SA 100, SA 400 and Virtual SA. The MiVoice provides a simple interface to bring all communications and tools together.

The Crowdstrike identifies the origin of malicious activity linked to an IP address associated with a Linux-based Mitel VoIP appliance.

"Although the threat actor deleted all files from the VoIP device's filesystem, CrowdStrike was able to recover forensic data from the device. This included the initial undocumented exploit used to compromise the device, the tools subsequently downloaded by the threat actor to the device, and even evidence of specific anti-forensic measures taken by the threat actor," said Bennett.

The security researcher Kevin Beaumont shared a string "Http.html hash:-1971546278" to search for vulnerable Mitel devices on the Shodan search engine in a Twitter thread. According to Kevin, there are approximately 21,000 publicly accessible Mitel appliances worldwide, the majority of which are located in the United States, succeeded by the United Kingdom.

News URL

https://threatpost.com/mitel-voip-bug-exploited/180079/