File: 1672.txt

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Rule:

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Sid:
1672

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Summary:
This event is generated when an attempt is made to exploit a buffer overflow associated with certain versions of the Sun Solaris FTP server.  

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Impact:
Reconnaissance.  An attacker may be able to examine records from the password shadow file.

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Detailed Information:
This event is generated when an attempt is made to exploit a buffer overflow vulnerability associated with a globbing function in Sun Solaris FTP servers.  An attacker may exploit this vulnerability by logging into the FTP server with a valid username and an invalid password then supplying the command "CWD ~".  This may produce a core dump in the root directory with world-readable permissions that could be examined to discover valid FTP users for the server.  

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Affected Systems:

SPARC

    * Solaris 2.5 without patch 103577-13
    * Solaris 2.5.1 without patch 103603-16
    * Solaris 2.6 without patch 106301-03
    * Solaris 2.7 without patch 110646-02
    * Solaris 2.8 without patch 111606-01

Intel

    * Solaris 2.5 without patch 103578-13
    * Solaris 2.5.1 without patch 103604-16
    * Solaris 2.6 without patch 106302-03
    * Solaris 2.7 without patch 110647-02
    * Solaris 2.8 without patch 111607-01

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Attack Scenarios:
An attacker may attempt to exploit this vulnerability to learn valid FTP usernames to later attempt brute force guessing of passwords.

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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 or apply the appropriate patch.

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Contributors:
Sourcefire Research Team
Brian Caswell <bmc@sourcefire.com> 
Nigel Houghton <nigel.houghton@sourcefire.com>
Judy Novak <judy.novak@sourcefire.com>

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Additional References:

Bugtraq:
http://www.securityfocus.com/bid/2601

CVE:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2001-0421

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