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From: Solar Designer <solar@openwall.com>
To: musl@lists.openwall.com
Subject: Re: Binaries compiled with musl (1.1.2) are vulnerable to an ancient ldd exploit
Date: Sat, 14 Jun 2014 22:37:25 +0400	[thread overview]
Message-ID: <20140614183725.GA13279@openwall.com> (raw)
In-Reply-To: <20140614182942.GL179@brightrain.aerifal.cx>

On Sat, Jun 14, 2014 at 02:29:42PM -0400, Rich Felker wrote:
> Stock glibc accepts all of the LD_* environment variables for
> suid/sgid, including dangerous ones, and only applies weak
> restrictions to them (for example it even allows LD_PRELOAD after
> imposing some insufficient conditions on the library to be preloaded).

Oh, I recall it allows LD_PRELOAD on libraries that are placed in system
directories and are themselves marked with the SUID bit.  IIRC, libc5's
dynamic linker had that, too.

Alexander


  reply	other threads:[~2014-06-14 18:37 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-06-14 15:35 Steven Honeyman
2014-06-14 15:50 ` Szabolcs Nagy
2014-06-14 15:51 ` Daniel Cegiełka
2014-06-14 16:03   ` Szabolcs Nagy
2014-06-14 16:16     ` Rich Felker
2014-06-14 16:02 ` Rich Felker
2014-06-14 16:10   ` Steven Honeyman
2014-06-14 16:30     ` Rich Felker
2014-06-14 16:14   ` Solar Designer
2014-06-14 16:24     ` Rich Felker
2014-06-14 16:27       ` Steven Honeyman
2014-06-14 16:42         ` Szabolcs Nagy
2014-06-14 17:11           ` Rich Felker
2014-06-14 17:24       ` Solar Designer
2014-06-14 18:29         ` Rich Felker
2014-06-14 18:37           ` Solar Designer [this message]
2014-06-14 19:39             ` Rich Felker

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