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Date: Fri, 28 May 2010 12:04:31 +0200
From: Ludwig Nussel <ludwig.nussel@...e.de>
To: oss-security@...ts.openwall.com
Cc: "Steven M. Christey" <coley@...us.mitre.org>
Subject: CVE request: ghostscript and gv
Hi,
ghostscript executes initialization files relative to the current
directory. Unfortunately the -dSAFER option has no effect on those
files. So when viewing a file e.g. in /tmp a local attacker could
have the victim execute arbitrary postscript programs.
Upstream suggested to use -P- in addition to -dSAFER. That however
would mean every program using gs to render postscript has to be
checked. So fixing ghostscripts default behavior might be easier for
distributions.
http://bugs.ghostscript.com/show_bug.cgi?id=691339
http://www.securityfocus.com/archive/1/511433
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=583316
https://bugzilla.novell.com/show_bug.cgi?id=608071
In the Debian bug report Paul also mentiones that gv creates a
temporary file in an insecure way:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=583316#10
cu
Ludwig
--
(o_ Ludwig Nussel
//\
V_/_ http://www.suse.de/
SUSE LINUX Products GmbH, GF: Markus Rex, HRB 16746 (AG Nuernberg)
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