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Message-ID: <4583871.CFr9RnDb4t@x2>
Date: Tue, 03 Jun 2014 11:08:12 -0400
From: Steve Grubb <sgrubb@...hat.com>
To: oss-security@...ts.openwall.com
Subject: Re: Bug in bash <= 4.3 [security feature bypassed]
On Tuesday, June 03, 2014 04:16:31 PM Hector Marco wrote:
> Recently we discovered a bug in bash. After some time after reporting
> it to bash developers, it has not been fixed.
>
> We think that this is a security issue because in some circumstances
> the bash security feature could be bypassed allowing the bash to be a
> valid target shell in an attack.
>
> We strongly recommend to patch your bash code.
>
> Why don't fix this bug by simple adding mandatory "if" clause ?
> Any comments about this issue are welcomed.
>
>
> Details at:
> http://hmarco.org/bugs/bash_4.3-setuid-bug.html
Aren't the calls to setuid and setgid backwards too? As in "POS36-C. Observe
correct revocation order while relinquishing privileges"
-Steve
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