full-disclosure - Re: [SECURITY] [DSA 523-1] New www-sql packages fix buffer overflow

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Message-ID: <1087765384.40d5fb88d7a72@webmail.uu.se>
From: Ulf.Harnhammar.9485 at student.uu.se (Ulf Härnhammar)
Subject: Re: [SECURITY] [DSA 523-1] New www-sql packages fix buffer overflow

www-sql has an include command, allowing programs written in www-sql
to include files. The buffer overflow occurs when an include command
in a web page has a too long path, either one that is hardcoded or
one that is stored in a variable. The buffer overflow is stack-based
and gives you control over EIP.

In the special case where the include command uses a parameter
controlled by the web page's visitors (by form data or otherwise),
the overflow can be exploited remotely. Otherwise it is a local
privilege escalation.

I have attached a patch (against version 0.5.7) and a sample
web page.

// Ulf Harnhammar
   Debian Security Audit Project
   http://www.debian.org/security/audit/

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