Rule Category

PROTOCOL-SERVICES -- Snort has detected traffic that may indicate the presence of the rservices protocol or vulnerabilities in the rservices protocols on the network.

Alert Message


Rule Explanation

This event is generated when an attempt to login as the superuser is attempted using rsh. Impact: Serious. If successful the attacker may have gained superuser access to the host. Details: This rule generates an event when a connection is made using "rsh" with the username "root". Such activity is indicative of attempts to abuse insecure machines with a known default configuration. Some UNIX systems use the "rsh" daemon which permits remote "root" logins. This may allow an attacker to connect to the machine and establish an interactive session. Ease of Attack: Simple, no exploit software required

What To Look For

Known Usage

No public information

False Positives

Known false positives, with the described conditions

A system administrator may be logging in to a host using the username "root"


Original rule by Max Vision <> modified from a signature written by Ron Gula Snort documentation contributed by Anton Chuvakin <> Cisco Talos Nigel Houghton

MITRE ATT&CK Framework



For reference, see the MITRE ATT&CK vulnerability types here:


Additional Links

Rule Vulnerability

CVE Additional Information

Cisco Prime LAN Management Solution (LMS) 4.1 through 4.2.2 on Linux does not properly validate authentication and authorization requests in TCP sessions, which allows remote attackers to execute arbitrary commands via a crafted session, aka Bug ID CSCuc79779.
SeverityHIGH Base Score10.0
Impact Score10.0 Exploit Score10.0
Confidentiality ImpactCOMPLETE Integrity ImpactCOMPLETE
Availability ImpactCOMPLETE Access Vector
AuthenticationNONE Ease of Access