Bug 881132 (CVE-2012-5577, CVE-2012-5578)

Summary: CVE-2012-5577 CVE-2012-5578 python-keyring: insecure permissions on configuration file
Product: [Other] Security Response Reporter: Vincent Danen <vdanen>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED WORKSFORME QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: bperkins, p, rtnpro
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Last Closed: 2019-03-29 00:23:30 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 881137, 881138    
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Description Vincent Danen 2012-11-28 17:30:09 UTC 
It was reported [1],[2] that python-keyring would create its configuration file world-readable.  This was corrected upstream, however the first commit only changed the permissions of an existing configuration file [3], which is incomplete.  A new bug report [4] indicated which sets the permissions on the keyring storage directory to mode 0700, which would fully protect the files.  There are patches attached to [4] that correct this; they've not been pulled into upstream yet.

CVE-2012-5578 was assigned to the incomplete fix (via the first patch) of CVE-2012-5577.

By the looks of things, python-keyring 0.7 (the current version in Fedora and EPEL) uses standard umask settings when creating files and will use whichever filename/path is provided (it does not have a concept of these storage directories to store data).  So it suffers from the same flaw, just in a slight different way.  Probably the best place to fix it is here:

keyring/backend.py:

373     def _init_file(self):
374         """Init the password file, set the password for it.
375         """
...
406
407         config_file = open(self.file_path,'w')
408         config.write(config_file)


[1] https://bitbucket.org/kang/python-keyring-lib/issue/67/set-go-rwx-on-keyring_passcfg
[2] https://bugs.launchpad.net/ubuntu/+source/python-keyring/+bug/1031465
[3] https://bitbucket.org/kang/python-keyring-lib/changeset/049cd181470f1ee6c540e1d64acf1def7b1de0c1
[4] https://bitbucket.org/kang/python-keyring-lib/issue/76/insecure-database-file-permissions
Comment 1 Vincent Danen 2012-11-28 17:33:52 UTC 
Created python-keyring tracking bugs for this issue

Affects: fedora-all [bug 881137]
Affects: epel-6 [bug 881138]