Date: Thu, 26 Jun 2014 00:44:38 -0400 (EDT) From: cve-assign@...re.org To: kseifried@...hat.com Cc: cve-assign@...re.org, oss-security@...ts.openwall.com Subject: Re: TMP flaw in rackspace jclouds? -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 > .add(exec("mkdir /tmp/$$")) > .add(extractTargzIntoDirectory(tgz, "/tmp/$$")) > .add(exec("mkdir -p " + dest)) > .add(exec("mv /tmp/$$/*/* " + dest)) > .add(exec("rm -rf /tmp/$$")).build()); Use CVE-2014-4651 for this vulnerability in Statements.java. Here are additional comments. A quick summary is that more CVEs might be required because of different discoverers (apparently one other person/organization made discoveries about five additional files) or different flaw types. 1. This is a somewhat unusual case for CVE. Apparently, the issue isn't that Statements.java has a Symlink Following vulnerability; it's that Statements.java generates code that has a Symlink Following vulnerability. Also, the generated code is never executed on a machine that executes Statements.java, so there's no confidentiality/integrity/availability impact to that machine. However, similar scenarios have qualified for CVE IDs. Possibly the most similar scenario is toolkits for building web applications, in which every generated application has an XSS vulnerability. 2. The general concepts of "generates code with flaw X" and "contains code with flaw X" would probably not be combined into one CVE, but we didn't immediately see any of the latter fixed in the https://github.com/andrewgaul/jclouds/commit/f371bd6afb6d64c3eb7bad0ecea396b42e23e8b2 commit. 3. We didn't immediately figure out whether any of the patched files with names containing "test" or "Test" are part of the installed product, or are only used during development. 4. Possibly, some of the code runs early in the process of setting up a new virtual machine, e.g., initscript_with_jetty.sh contains an "exec 3<> /etc/ssh/sshd_config" line that might be the initial configuration of an sshd_config file. The details of this specific file are not especially relevant. The point is that, if anyone finds a situation where code with a Symlink Following vulnerability executes only during machine provisioning, before any untrusted person is able to login to an unprivileged account, then that Symlink Following vulnerability is unexploitable and shouldn't have a CVE ID assigned. 5. We don't really understand why this product is retrieving .tgz files from http URLs with curl, extracting the archives, apparently not attempting to verify file integrity, and executing files. Possibly this is considered relatively safe because the code would normally be executed within a data center of a professional cloud-services provider, and man-in-the-middle attacks would be relatively difficult compared to, say, attacks against http download/extract/execute by a client on a Wi-Fi network. But, we're not really sure. For example, does https://github.com/jclouds/jclouds/blob/master/scriptbuilder/src/test/resources/test_install_rubygems_scriptbuilder.sh have an implied security policy that the sequence of steps from "GET http://production.cf.rubygems.org/rubygems/rubygems-1.8.10.tgz" to "ruby setup.rb" is "safe enough" against man-in-the-middle? - -- CVE assignment team, MITRE CVE Numbering Authority M/S M300 202 Burlington Road, Bedford, MA 01730 USA [ PGP key available through http://cve.mitre.org/cve/request_id.html ] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.14 (SunOS) iQEcBAEBAgAGBQJTq6RsAAoJEKllVAevmvmsk54H/01eLKWTtaR2GOrBXuTkJguY 1DQrfk2yF6/p/aS53ZCiXYzBdKyy42o6c01vax/Q0Vt3bQ7Ek6UGIOBhHLF+ui90 uWZbRYg9y1lekhbr/C4i+zFV6HaVXYl9njlcCeKpn4ESThx5v3RZOZO/BNJ7D4fZ mZnmEJK1zky8greCGlnrod2xCLMpLAIAv2LX8FJnOJef9GI6pU18Gq+XU0FJqg2g dIQLoNdrokclzj7n6T1cnSanQevKG96ZNRISY6DgelQ1qp1u8Gd/R9AKH5g07qfd In8MSw7OKtBcLLjZUxUiXaILNKFjZGxUP9+eBX1tmh/wCalNaUIjPXBq1kfjBLQ= =y2sL -----END PGP SIGNATURE-----
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