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OpenSSH User Identification Vulnerability
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Secunia Advisory:
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SA8720
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Release Date:
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2003-05-02
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Popularity:
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11,673 views
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Critical:
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Less critical
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Impact:
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Exposure of sensitive information
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Where:
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From remote
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Solution Status:
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Unpatched
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| Software: | OpenSSH 3.x
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Secunia CVSS-2 Score:
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Available in Secunia business solutions 
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| Advisory Content (Page 1 of 3) | [ 1 ] [ 2 ] [ 3 ] | |
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Description:
A vulnerability has been identified in OpenSSH, which can be exploited by malicious people to enumerate valid users on a vulnerable system.
A malicious person can determine whether a user exists on a system or not by measuring the time it takes before a reply is received when connecting to the ssh service with an arbitrary user name. The problem is that OpenSSH returns an error message immidiately when the user is non-existant, while there is an approximately two second delay if the user is valid.
Successful exploitation requires that OpenSSH has been compiled with PAM support.
OpenSSH version 3.6.1p1 and prior have been reported vulnerable.
Change Page:
[ 1 ] [ 2 ] [ 3 ]
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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