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AN HTTPd Sample Script File Corruption Vulnerability
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Secunia Advisory:
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SA8628
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Release Date:
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2003-04-22
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Popularity:
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5,353 views
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Critical:
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Moderately critical
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Impact:
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Manipulation of data
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Where:
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From remote
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Solution Status:
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Partial Fix
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| Software: | AN HTTPD 1.x
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Description:
A vulnerability has been identified in AN HTTPd, which can be exploited by malicious people to overwrite arbitrary files on a vulnerable system.
The vulnerability is caused due to an input validation error in the sample script "count.pl". The problem is that the script doesn't check for "../" in the supplied argument, which can be exploited to overwrite the contents of a file on the system with numeric data by supplying the path to it as an argument.
An example, which overwrites "calc.exe", was included in the original advisory:
http://www.somesite.com/isapi/count.pl?../../../../../../../../../../windows/system32/calc.exe
The vulnerability has been reported in version 1.42h and prior.
Solution:
Restrict access to the sample scripts or delete them.
Provided and/or discovered by:
Matthew Murphy
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About this Secunia Advisory
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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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