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Date: Wed, 10 May 2017 10:59:34 -0500
From: Brandon Perry <>
Subject: Re: Numerous FreeTDS crashes fixed on master

I was asked what software this affects.

PHP - <>
Perl DBI - <>
Ruby DBI w/ Sybase - <>
Python-Sybase - <>

Other languages have less-official bindings.

Go - <>
Erlang - <>
R - <>

Also, obviously the tsql binary if used to connect to an untrusted MSSQL/Sybase server.

> On May 9, 2017, at 9:34 AM, Brandon Perry <> wrote:
> Attached is a zip file of reported TDS streams that cause segmentation faults in the FreeTDS library. The ‘tsql’ binary was used for the fuzzing, so these most likely only affect client-side functionality. These have been resolved on master and the 1.0 branch.
> Also included in the zip file is a bucket.txt, a crashwalk db dump detailing the crashes for the files in the zip file.
> You can find the bucket.txt itself in the following Github gist as well. No CVE’s have been requested.
> <>
> To test, you can compile FreeTDS, then use preeny to redirect network IO to stdin/stdout.
> export LD_PRELOAD=~/preeny/x86_64-linux-gnu/
> unzip
> cd rpt
> for i in id*; do valgrind ~/freetds/build/src/apps/tsql -S -U fdsa -P fdsa -I ~/tdsconfig < $i; done
> A simple tdsconfig file can be used to speed things up a bit.
> [global]
> timeout = 1
> connect timeout = 1
> Many thanks to Frediano Ziglio, the maintainer of FreeTDS, for quick communication and bug fix turn arounds.
> <>

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