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Date: Wed, 10 Nov 2010 15:18:26 +0100
From: Thomas Biege <thomas@...e.de>
To: oss-security@...ts.openwall.com
Subject: CVE request: mono loading shared libs from cwd
Hello folks,
from our bugzilla.
"
http://www.mono-project.com/DllNotFoundException explains that the mono
runtime
searches the current working directory for DLLs. This opens a serious
security
hole. Malicious code can be given the same name as a DLL and left in a
directory the user might visit. Also, it means that no mono application can
safely set the current working directory.
Microsoft themselves addressed this issue in Windows
http://msdn.microsoft.com/en-us/library/ms682586(v=VS.85).aspx
It's a well known "dummies" question for Unix why you must not have "." on
your
path
http://www.unix.com/unix-dummies-questions-answers/22806-why-bad-idea-insert-
dot-path.html
Mono is exposing users to these same old hat problems.
(As a related problem, many mono programs seem to *assume* that they will be
run with the CWD set to their installed directory, and break if it isn't.)
"
Filed by Richard Brooksby.
--
Thomas Biege <thomas@...e.de>, SUSE LINUX, Security Support & Auditing
SUSE LINUX Products GmbH, GF: Markus Rex, HRB 16746 (AG Nuernberg)
--
Wer aufhoert besser werden zu wollen, hoert auf gut zu sein.
-- Marie von Ebner-Eschenbach
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