GEN:SID | 1:329 |
Message | FINGER cybercop redirection |
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 by the Cybercop vulnerability scanner.
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 uses the Cybercop vulnerability scanner to test for this weakness.
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Ease of Attack | Simple, performed by a scanner
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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 | CVE: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-1999-0105
Arachnids: http://www.whitehats.com/info/IDS11
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Rule References | arachnids: 11
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