Rule Category

SERVER-SAMBA -- Snort has detected traffic exploiting vulnerabilities in Samba servers.

Alert Message

SERVER-SAMBA Samba write andx command memory leak attempt

Rule Explanation

This event is generated when a crafted malicious SMB packet is intended to leak the memory of a Samba server in a file via a write operation on a Samba share. Impact: Attempted User Privilege Gain Details: This vulnerability relies in the way how the Samba server is not able to check the correct range of data length that a SMB client states is going to send, hence the client can send more data and make the Samba server to leak some sections of it's memory into the content of the file the client wants to write. The client is not able to choose what memory section leak, though. Even though this vulnerability is present in deprecated SMB protocol commands, the vulnerable functions are still present in the code, hence if an authenticated SMB client uses the vulnerable commands, will be able to exploit this vulnerability Ease of Attack: Hard

What To Look For

Known Usage

No public information

False Positives

No known false positives

Contributors

Cisco Talos Intelligence Group

MITRE ATT&CK Framework

Tactic:

Technique:

For reference, see the MITRE ATT&CK vulnerability types here: https://attack.mitre.org

Additional Links

CVE Additional Information