Untrusted search path vulnerability in Epiphany's Python interface allows 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=504363 Test case available in: 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=sanitize_sys.path.diff;att=1;bug=504363 Patch notes: The path for affected file in Fedora is BUILD/epiphany-N.V.R/src/ephy-python.c, the proposed patch won't apply cleanly, but the change of: ++ /* Sanitize sys.path to prevent relative imports loading modules in ++ * the current working directory ++ */ ++ PyRun_SimpleString("import sys; sys.path = filter(None, sys.path)") in ephy-python.c should be enough to fix this issue.
This issue affects all versions of the epiphany browser packages, as shipped with Fedora releases of 9, 10 and devel. Please fix.
Common Vulnerabilities and Exposures assigned an identifier CVE-2008-5985 to this vulnerability: Untrusted search path vulnerability in the Python interface in Epiphany 2.22.3, 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://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5985 http://www.openwall.com/lists/oss-security/2009/01/26/2 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=504363
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
Created epiphany tracking bugs for this issue Affects: fedora-all [bug 665467]