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Date: Tue, 8 Mar 2011 10:14:39 +0100
From: Tomas Hoger <>
Subject: Re: ldd can execute an app unexpectedly

On Mon, 7 Mar 2011 18:27:05 -0500 Steve Grubb wrote:

> Besides telling everyone don't do that. ldd could take the PoV that
> it should only call runtime linkers in trusted directories like /sbin
> or /usr/sbin.

Upstream does not seem to consider this to be an issue:

Debian also uses the patch similar to what ldv pointed out - it changes
ldd to always do:

  LD_TRACE_LOADED_OBJECTS=1 /lib/ /path/to/ELF-lib-or-binary

rather than:

  LD_TRACE_LOADED_OBJECTS=1 /path/to/ELF-lib-or-binary

Tomas Hoger / Red Hat Security Response Team

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