Rule: -- Sid: 2104 -- Summary: This event is generated when an attempt is made to exploit a vulnerability in the rexec daemon is unsucessful. This event is an indication that someone supplied an overly long username to the rexec daemon. -- Impact: Serious. An attacker may gain escalated privileges offering super user access on the affected host. -- Detailed Information: Rexec offers users the ability to execute commands on a host from remote locations. A vulnerability exists such that an when an overly long username is supplied to the rexec daemon, a buffer overflow condition may occur thus presenting the attacker with the opportunity to execute arbitrary code and possibly gain escalated privileges on the target host. -- Attack Scenarios: Simple. -- Ease of Attack: Simple. -- False Positives: None Known -- False Negatives: None Known -- Corrective Action: Upgrade to the latest non-affected version of the software. Disallow rexec commands from sources external to the protected network. -- Contributors: Sourcefire Research Team Brian Caswell <bmc@sourcefire.com> Nigel Houghton <nigel.houghton@sourcefire.com> -- Additional References: --
