Bug 1082177 (CVE-2014-2667) - CVE-2014-2667 python: os.makedirs(exist_ok=True) is not thread-safe in Python 3.x
Summary: CVE-2014-2667 python: os.makedirs(exist_ok=True) is not thread-safe in Python...
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2014-2667
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1083594
Blocks: 1082178
TreeView+ depends on / blocked
 
Reported: 2014-03-28 22:19 UTC by Vincent Danen
Modified: 2021-02-17 06:43 UTC (History)
22 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2016-11-03 21:07:34 UTC
Embargoed:

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Description Vincent Danen 2014-03-28 22:19:00 UTC 
It was reported [1] that a patch added to Python 3.2 [2] caused a race condition where a file created could be created with world read/write permissions instead of the permissions dictated by the original umask of the process.  This could allow a local attacker that could win the race to view and edit files created by a program using this call.

Note that prior versions of Python, including 2.x, do not include the vulnerable _get_masked_mode() function that is used by os.makedirs() when exist_ok is set to True.


[1] http://bugs.python.org/issue21082
[2] http://bugs.python.org/issue9299
Comment 1 Vincent Danen 2014-03-28 22:25:59 UTC 
CVE request:

http://openwall.com/lists/oss-security/2014/03/28/15
Comment 2 Vincent Danen 2014-03-28 22:26:33 UTC 
Statement:

Not vulnerable. This issue did not affect the versions of python as shipped with Red Hat Enterprise Linux 5 and 6.
Comment 3 Murray McAllister 2014-03-31 06:08:08 UTC 
MITRE assigned CVE-2014-2667 to this issue:

http://seclists.org/oss-sec/2014/q1/700
Comment 4 Stefan Cornelius 2014-04-02 14:15:48 UTC 
Created python3 tracking bugs for this issue:

Affects: fedora-all [bug 1083594]
Comment 6 Fedora Update System 2014-12-12 04:23:28 UTC 
python3-3.3.2-19.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 7 Fedora Update System 2015-01-06 06:16:35 UTC 
python3-3.3.2-11.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.
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