Untrusted search path vulnerability in Csound's "VST plugin with Python scripting" and in "VST plugin for writing score generators in Python" alows local users to execute arbitrary code via a Trojan horse Python file in the current working directory, related to an erroneous setting of sys.path by the PySys_SetArgv function. References: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=504359 Test case and more discussion about this issue available at: http://www.nabble.com/Bug-484305%3A-bicyclerepair%3A-bike.vim-imports-untrusted-python-files-from-cwd-td18848099.html Proposed patch: http://bugs.debian.org/cgi-bin/bugreport.cgi?msg=5;filename=1004-sanitize-sys.path.diff;att=1;bug=504359
This issue affects all versions of the Csound package, as shipped with Fedora releases of 9, 10 and devel. Please fix.
Common Vulnerabilities and Exposures assigned an identifier CVE-2008-5986 to this vulnerability: Untrusted search path vulnerability in the (1) "VST plugin with Python scripting" and (2) "VST plugin for writing score generators in Python" in Csound 5.08.2, and possibly other versions, allows local users to execute arbitrary code via a Trojan horse Python file in the current working directory, related to a vulnerability in the PySys_SetArgv function (CVE-2008-5983). References: http://www.openwall.com/lists/oss-security/2009/01/26/2 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=504359
More explanation why this issue wasn't fixed in Python yet, can be found here: https://bugzilla.redhat.com/show_bug.cgi?id=482814#c1 here: https://bugzilla.redhat.com/show_bug.cgi?id=482814#c4 and here: https://bugzilla.redhat.com/show_bug.cgi?id=482814#c5 Looks like the Python fix won't come anytime soon, so please fix the issue in the package, till we find the proper Python solution.
Ray Strode's test case to check the work of the fix can be found here: https://bugzilla.redhat.com/show_bug.cgi?id=481556#c8