Re: [SECURITY] FDs 0, 1, 2 for SUID/SGID programs

Alan Cox (alan@lxorguk.ukuu.org.uk)
Tue, 23 Apr 2002 10:04:20 +0100 (BST)

> http://www.pine.nl/advisories/pine-cert-20020401.html probably affects
> Linux, too (if a SUID/SGID program is invoked with FD 2 closed, error
> messages might be written to a file opened by the program ).

Unix requires this behaviour. Its an old and common bug to get it
wrong. glibc intentionally provides some cover
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