GEN:SID | 1:330 |
Message | FINGER redirection attempt |
Summary | This is an intelligence gathering activity. This event is indicative of a connection laundering attack against the finger daemon
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Impact | The attacker may obtain information about a third party host without making a direct connection to that host.
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Detailed Information | The event is generated when an attempt to use a machine to run finger queries against a third party UNIX system is attempted.
The attack utilizes "finger forwarding" functionality, normally used to forward queries to a third party machine. The information is obtained without a direct connection to the said third party, since the target system performs a connection to the third party host for the attacker.
The Finger daemon is used to provide information about users on a UNIX system. It used to be installed and enabled by default on most UNIX/Linux systems. The attack if successful, will confirm that the target host will try to forward queries.
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Affected Systems | |
Attack Scenarios | An attacker runs a finger query and obtains information about the root account. He then proceeds to compromise the system using the obtained data as a basis for the compromise.
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Ease of Attack | Simple, no exploit software required
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Corrective Action | Disable the finger daemon or upgrade to a daemon without finger forwarding functionality
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Additional References | Nessus: http://cgi.nessus.org/plugins/dump.php3?id=10073
CVE: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-1999-0105
Arachnids: http://www.whitehats.com/info/IDS251
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Rule References | arachnids: 251
cve: 1999-0105
nessus: 10073
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