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Re: Potential vulnerabilities in BASH 4.3


From: Chet Ramey
Subject: Re: Potential vulnerabilities in BASH 4.3
Date: Tue, 12 Aug 2014 09:04:39 -0400
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:24.0) Gecko/20100101 Thunderbird/24.6.0

On 8/11/14, 3:07 PM, Hádrian R wrote:
> Hi, I'm Hádrien Romero Soria - @Kaiwaiata​​, I am a 16 year old boy,
> passionate about computer security, since more than 8h searching and
> finding various possible vulnerabilities in source code of bash..
> I will tell you one vulnerability now, if they treat me well I will tell
> the other..
> 
> foolish or important things?
> 
> unsafe use of *strcpy():*
> 
> bash-4.3.tar\bash-4.3\lib\sh\unicode.c:
> *line 87: *strcpy (charsetbuf, locale);

Thanks for the report.  This is a potential vulnerability if the value of
the LC_CTYPE variable is longer than 40 characters.

Chet

-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU    address@hidden    http://cnswww.cns.cwru.edu/~chet/



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