Cisco Coverage for Smart Install Client Protocol Abuse
Summary: Talos reported active scanning of customer infrastructure to find Cisco Smart Install clients, exploiting a known issue in the Smart Install protocol that can lead to modification of the TFTP server setting, exfiltration of configuration files via TFTP, replacement of the IOS image, and potentially execution of IOS commands. A publicly released tool called the Smart Install Exploitation Tool (SIET) may be in use in these attacks, and Talos released its own scanning utility plus Snort rules sids 41722-41725, with generic TFTP rules sid:518 and sid:1444 available but not issue-specific and requiring explicit enablement.
What you should know: Malicious actors with detailed knowledge of the Smart Install Protocol may already be pulling copies of customer configurations off affected devices, and the public release of SIET lowers the bar for anyone to try the same against your switches.
Read the original at Cisco Talos ↗
- Topics
- Malware
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