CVE-2014-2667

Gentoo Linux Security Advisory 201503-10

Severity Score

7.0

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Race condition in the _get_masked_mode function in Lib/os.py in Python 3.2 through 3.5, when exist_ok is set to true and multiple threads are used, might allow local users to bypass intended file permissions by leveraging a separate application vulnerability before the umask has been set to the expected value.

Condición de carrera en la función _get_masked_mode en Lib/os.py en Python 3.2 hasta 3.5, cuando exist_ok está activado y se utilizan múltiples hilos, podría permitir a usuarios locales saltarse el archivo destinado a los permisos aprovechando una vulnerabilidad de solicitud por separado antes de que umask haya sido ajustado al valor esperado.

Updated python3 packages fix security vulnerabilities. ZipExtFile.read goes into 100% CPU infinite loop on maliciously binary edited zips. A vulnerability was reported in Python's socket module, due to a boundary error within the sock_recvfrom_into() function, which could be exploited to cause a buffer overflow. This could be used to crash a Python application that uses the socket.recvfrom_info() function or, possibly, execute arbitrary code with the permissions of the user running vulnerable Python code. It was reported that a patch added to Python 3.2 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. Python are susceptible to arbitrary process memory reading by a user or adversary due to a bug in the _json module caused by insufficient bounds checking. The bug is caused by allowing the user to supply a negative value that is used an an array index, causing the scanstring function to access process memory outside of the string it is intended to access. The CGIHTTPServer Python module does not properly handle URL-encoded path separators in URLs. This may enable attackers to disclose a CGI script's source code or execute arbitrary scripts in the server's document root.

*Credits: N/A

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2014-03-26 CVE Reserved
2014-11-16 CVE Published
2024-08-06 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CAPEC

References (8)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2014/03/28/15	Mailing List
http://www.openwall.com/lists/oss-security/2014/03/29/5	Mailing List
http://www.openwall.com/lists/oss-security/2014/03/30/4	Mailing List

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://bugs.python.org/issue21082	2017-07-01
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html	2017-07-01
http://lists.opensuse.org/opensuse-updates/2014-05/msg00007.html	2017-07-01
http://lists.opensuse.org/opensuse-updates/2014-05/msg00008.html	2017-07-01
https://security.gentoo.org/glsa/201503-10	2017-07-01

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.2.0 Search vendor "Python" for product "Python" and version "3.2.0"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.2.1 Search vendor "Python" for product "Python" and version "3.2.1"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.2.2 Search vendor "Python" for product "Python" and version "3.2.2"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.2.3 Search vendor "Python" for product "Python" and version "3.2.3"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.2.4 Search vendor "Python" for product "Python" and version "3.2.4"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.2.5 Search vendor "Python" for product "Python" and version "3.2.5"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.2.6 Search vendor "Python" for product "Python" and version "3.2.6"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.3.0 Search vendor "Python" for product "Python" and version "3.3.0"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.3.1 Search vendor "Python" for product "Python" and version "3.3.1"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.3.2 Search vendor "Python" for product "Python" and version "3.3.2"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.3.3 Search vendor "Python" for product "Python" and version "3.3.3"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.3.4 Search vendor "Python" for product "Python" and version "3.3.4"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.3.5 Search vendor "Python" for product "Python" and version "3.3.5"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.3.6 Search vendor "Python" for product "Python" and version "3.3.6"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.4.0 Search vendor "Python" for product "Python" and version "3.4.0"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.4.1 Search vendor "Python" for product "Python" and version "3.4.1"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.4.2 Search vendor "Python" for product "Python" and version "3.4.2"		-		Affected