GEN:SID | 1:326 |
Message | FINGER remote command execution attempt |
Summary | This event is generated when a remote command execution exploit against a finger daemon is attempted.
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Impact | Serious. The attacker may be presented with the opportunity to run a command of his choice on the target UNIX system
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Detailed Information | This event is generated when a specific attack against a vulnerable version of finger daemon is detected.
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 may allow an attacker to execute a command remotely on a target system with the privileges of the user running the "finger" daemon. The user is usually defined in the /etc/inetd.conf file and is commonly designated as "nobody".
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Affected Systems | |
Attack Scenarios | An attacker may try the attack and then executes a command to download a backdoor to the target system. He then connects to the system and may attempt to escalate his privileges by exploiting a local SUID application to gain "root" privileges.
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Ease of Attack | Simple, no exploit software is required, just a specially formatted finger query
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Corrective Action | Disable the finger daemon or limit the addresses that can access the service via firewall or TCP wrappers.
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Additional References | Arachnids: http://www.whitehats.com/info/IDS379
Bugtraq: http://online.securityfocus.com/bid/974
CVE: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-1999-0150
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Rule References | arachnids: 379
bugtraq: 974
cve: 1999-0150
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