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YaBB Execution of Arbitrary Code
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Secunia Advisory:
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SA8762
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Release Date:
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2003-05-12
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Last Update:
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2003-05-13
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Critical:
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Not critical
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Impact:
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System access
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Where:
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From remote
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Solution Status:
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Vendor Workaround
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| Software: | YaBB SE 1.x
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Description:
A vulnerability has been identified in YaBB SE allowing malicious people to execute arbitrary PHP code on the web server.
The problem is that the "sourcedir" variable in "SSI.php" isn't verfied before it is used in an "include_once" function call. This allows malicious users to supply a path to a remote web server with malicious versions of "Errors.php", "Subs.php" and "Load.php".
Further testing of this vulnerability shows that it can only be reproduced if YaBB SE has not been installed correctly ie. wrong path information or too restrictive file permissions. This is therefore not a vulnerability but a matter of misconfiguration.
Solution:
Make sure that YaBB SE has been installed correctly and doesn't return any error messages.
Provided and/or discovered by:
Dalibor Karlovic & DownBload
Changelog:
13/05-2003 The vendor contacted us to inform that this was infact not a vulnerability. We tested this and found this to be true.
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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7 Related Secunia Security Advisories
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1. YaBB SE "user" SQL Injection Vulnerability
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2. YaBB / YaBB SE Formatting Tag Cross-Site Scripting Vulnerability
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3. YaBB SE "quote" Parameter SQL Injection Vulnerability
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4. YaBB SE SQL Injection Vulnerability
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5. YABB SE Arbitrary File Inclusion Vulnerability
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6. YaBB SE remote code execution
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7. YaBB SE "Reminder.php" SQL injection Vulnerability
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