2104.txt

snort入侵检测规则文件2.4 Snort是众所周知的网络入侵检测工具

Rule:

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Sid:
2104

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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.

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Impact:
Serious.  An attacker may gain escalated privileges offering super user access on the affected host.

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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.

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Attack Scenarios:
Simple.

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Ease of Attack:
Simple.

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False Positives:
None Known

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False Negatives:
None Known

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Corrective Action:
Upgrade to the latest non-affected version of the software.

Disallow rexec commands from sources external to the protected network.

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Contributors:
Sourcefire Research Team
Brian Caswell <[e-mail]>
Nigel Houghton <[e-mail]>

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Additional References:

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